tag:blogger.com,1999:blog-85734463320820823342024-03-19T03:24:32.136-07:00Building Stuff In the BasementJohnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-8573446332082082334.post-11736612055363286962018-07-11T08:36:00.001-07:002018-07-11T08:36:04.400-07:00Micros WS6 terminal screen replacement<div class="separator" style="clear: both; text-align: center;">
<iframe width="320" height="266" class="YOUTUBE-iframe-video" data-thumbnail-src="https://i.ytimg.com/vi/4nesGxR-Gi0/0.jpg" src="https://www.youtube.com/embed/4nesGxR-Gi0?feature=player_embedded" frameborder="0" allowfullscreen></iframe></div>
You too can replace a screen on a micros WS6 terminal. watch this very boring video to find out how.Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-38133611005807437712016-03-26T09:18:00.003-07:002016-04-07T12:06:44.218-07:002016 LED Lightbulb Review<br />
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While outfitting my house with 100% LED lighting, I have selected a few bulbs that stand out among the competition. 2016 saw some new bulbs as well as price reductions. It turns out that all the bulbs I'm recommending are Philips brand. They seem to get the color right, and in my 2 years of testing I'm happy to report a a 0% failure rate among my fleet of 51 Philips bulbs. I had at least 1 Cree bulb fail, as well as 1 Ikea bulb fail. <br />
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All of the bulbs tested have passed the spouse color review process - many bulbs had immediate rejections in this phase and had to be returned. Most stores will accept returns of an open package, so keep your receipts. If the packaging says "Daylight" anywhere on it, or the color number is above 2700K, leave it on the shelf. The brightness is measured in Lumens. a "60W equivalent bulb" is a subjective term may be rated anywhere between 650 and 850 lumens.<br />
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Also, all of the bulbs here are $15 each or less. I'll remind you not to be cheap about this. If you need to justify the expense, add up the total cost of ownership of an ordinary incandescent bulb (including electricity costs) and you'll find that your $10 LED bulb pays for itself within 1 year. These LED bulbs will also last over 10 years, so add in the cost of 5 bulbs that last 2 years. Also, if you don't like the color, you have to live with it for the 20-year life span of the bulb unless you toss it and get something better, but what a waste that would be.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpG59SEalF-8g48DM41c-Vf-j8o87PUxzyMgWdW4geiieplZE3wxTA182fdlzFmwWIkYTEEL_kX76_WGDxH_nEX0iI3U4XmBx5bM_kPhU8TnwULI8l0yX1iGonxDN0IHHQ8EWTuh5naNXO/s1600/warm+glo+logo.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="143" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpG59SEalF-8g48DM41c-Vf-j8o87PUxzyMgWdW4geiieplZE3wxTA182fdlzFmwWIkYTEEL_kX76_WGDxH_nEX0iI3U4XmBx5bM_kPhU8TnwULI8l0yX1iGonxDN0IHHQ8EWTuh5naNXO/s200/warm+glo+logo.jpg" width="200" /></a>
<span style="font-family: "times new roman";">A Note on Dimmable Bulbs</span><br />
Any time you buy bulbs for a dimmable fixture, be sure to get LED bulbs that at least claim to be dimmable. better yet, get the Philips bulbs with the "Warm Glow" feature. This feature means that the bulb changes color to a warm red glow when dimmed all the way, mimicking the color of an incandescent bulb.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhanUveWMAau9icbgbeypyG3qyq_-WMWnclxZEM0e_RM6dDq9gAVhNSuCCZXMIGnRAtPEyda_zY_Bs1-naffg7jKozptL9A918tHBeePl9ZFV2qxd0DzRAfCspHRrelh5iXnGkZ1ARRg0-c/s1600/br30.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhanUveWMAau9icbgbeypyG3qyq_-WMWnclxZEM0e_RM6dDq9gAVhNSuCCZXMIGnRAtPEyda_zY_Bs1-naffg7jKozptL9A918tHBeePl9ZFV2qxd0DzRAfCspHRrelh5iXnGkZ1ARRg0-c/s200/br30.jpg" width="200" /></a>If your house is like mine, you have dozens of pot lights, which are recessed into the ceiling and require the BR30 shape bulb. The Philips WarmGlow dimmable BR30 bulb puts out plenty of light and looks great when dimmed. Many stores carry these for $10 - but at my local Home Depot, the price is about $5 since my local utility subsidizes a selection of efficient bulbs.<br />
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<a href="http://www.homedepot.com/p/Philips-65W-Equivalent-Soft-White-BR30-Dimmable-LED-Warm-Glow-Effect-Light-Bulb-E-457069/206341869" target="_blank">Home Depot</a> $10 | <a href="http://www.walmart.com/ip/Philips-Philips-WarmGlow-9W-BR30-LED-2700K-Soft-White-Dimmable-Bulb-65w-equiv./49908986" target="_blank">Walmart</a> $10<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhh9HN7E0OofbTsSyzzQgAnb1rS977hoFopNspHRTOjFsucQNYZF4RmjRi71RNHN-1U8Sif-wCxJD6d2Lj4tZC1DP2skFwUR7CMcQmUsNV6eF_el3duRLx116R_DPZW0hg3n6U1OXQw4vkA/s1600/a19+white.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhh9HN7E0OofbTsSyzzQgAnb1rS977hoFopNspHRTOjFsucQNYZF4RmjRi71RNHN-1U8Sif-wCxJD6d2Lj4tZC1DP2skFwUR7CMcQmUsNV6eF_el3duRLx116R_DPZW0hg3n6U1OXQw4vkA/s200/a19+white.jpg" width="200" /></a>
For sockets that are under lamp shades or otherwise hidden, the opaque white plastic bulbs are a little cheaper than the clear ones.<br />
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Dimmable A19: <a href="http://www.homedepot.com/p/Philips-60W-Equivalent-Soft-White-A19-Dimmable-LED-with-Warm-Glow-Light-Effect-Household-Light-Bulb-461434/205818695" target="_blank">Home Depot</a> $7<br />
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If they do not need to be dimmable, you can get a 4-pack for $10 at<br />
<a href="http://www.homedepot.com/p/Philips-60W-Equivalent-Soft-White-A19-LED-Light-Bulb-4-Pack-455949-2/206766847" target="_blank">Home Depot</a><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQoOyAw7T3YP_siMRRgRL6W4SRjp_JMpyJIIQ7ge-0Ed05rHuOL_6jd_TIKiTh57FJBGepKJ3xlML8J9rTCmF9rKaOc7cBCcvV4vPCCKMpzN_X9T5tYYXZqWGr4NgiWDy1S70u4QZKsI_c/s1600/philips+clear.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><br /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQoOyAw7T3YP_siMRRgRL6W4SRjp_JMpyJIIQ7ge-0Ed05rHuOL_6jd_TIKiTh57FJBGepKJ3xlML8J9rTCmF9rKaOc7cBCcvV4vPCCKMpzN_X9T5tYYXZqWGr4NgiWDy1S70u4QZKsI_c/s1600/philips+clear.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQoOyAw7T3YP_siMRRgRL6W4SRjp_JMpyJIIQ7ge-0Ed05rHuOL_6jd_TIKiTh57FJBGepKJ3xlML8J9rTCmF9rKaOc7cBCcvV4vPCCKMpzN_X9T5tYYXZqWGr4NgiWDy1S70u4QZKsI_c/s400/philips+clear.jpg" /></a>
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Exposed bulbs or bulbs in glass fixtures need to look have a clear dome - these look great in my ceiling fan.<br />
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<a href="http://www.homedepot.com/p/Philips-60W-Equivalent-Soft-White-Clear-A19-Dimmable-LED-with-Warm-Glow-Light-Effect-Light-Bulb-458828/206514310" target="_blank">Home Depot</a> $7<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirYXX8mGEPWXIbj1S7PuIbXpWhhjqOYE8GWbf1wnXTJ52LI-Qree-eLaR9BBm5dduOEaJv77cFO0hEsGvW_kAJ13XU2tCwIqn8WmWeXxbT9dn18Ue26vJmU2_ghhtrxiXlIzotI5I9TC5P/s1600/Philips+LED+Candelabra.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirYXX8mGEPWXIbj1S7PuIbXpWhhjqOYE8GWbf1wnXTJ52LI-Qree-eLaR9BBm5dduOEaJv77cFO0hEsGvW_kAJ13XU2tCwIqn8WmWeXxbT9dn18Ue26vJmU2_ghhtrxiXlIzotI5I9TC5P/s200/Philips+LED+Candelabra.png" width="156" /></a><br />
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Chandeliers usually require candelabra base bulbs. Philips finally came out with a candelabra base bulb that is a 60w equivalent and also has the WarmGlow feature.<br />
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<a href="http://www.homedepot.com/p/Philips-60W-Equivalent-Soft-White-B11-Dimmable-Blunt-Tip-Candle-with-Warm-Glow-Light-Effect-LED-Light-Bulb-458687/206517163" target="_blank">Home Depot</a> $10<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYwfHOcDDGrlBNdZvXx4cpVUcrcpFfny9Et_vIYVua_9Vy5Ki58HglLUshqJHbDNthw8LT9nEJnukTSiELdgJKIQOoTQkvGhM1VbD9VH3vNsh4RC0VyVo3Nkl45jP2yZ8-MHW7kyKBnHlP/s1600/3way.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYwfHOcDDGrlBNdZvXx4cpVUcrcpFfny9Et_vIYVua_9Vy5Ki58HglLUshqJHbDNthw8LT9nEJnukTSiELdgJKIQOoTQkvGhM1VbD9VH3vNsh4RC0VyVo3Nkl45jP2yZ8-MHW7kyKBnHlP/s200/3way.jpg" width="200" /></a><br />
3-way bulbs are for those lamps that you have to turn-click twice to turn on and off. This bulb cranks out 1620 lumens when you need it, or 470 / 840 lumens when you don't. They are also very nearly indestructible. After a 3-year-old knocks over the lamp for the 20th time, you'll see how the bulb might outlast the lamp.<br />
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<a href="http://www.homedepot.com/p/Philips-40-60-100W-Equivalent-Soft-White-2700K-3-Way-A21-LED-Light-Bulb-453340/205427985?cm_mmc=SEM|THD|google|&mid=sW0ryjiIV|dc_mtid_8903o6225187_pcrid_89371456814_pkw__pmt__product_205427985_slid_&gclid=Cj0KEQjw5ti3BRD89aDFnb3SxPcBEiQAssnp0ov3ik07_woSrhw-7AnuJRkQmv9cSlDDhjFzVTE5ESsaAlGV8P8HAQ" target="_blank">Home Depot</a> $20<br />Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-44070613137721310942014-11-14T21:20:00.001-08:002014-11-14T23:12:09.533-08:00All incandescent bulbs must be destroyed<div class="separator" style="clear: both; text-align: center;">
<a href="http://media.economist.com/images/20090321/1209ST4.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" src="http://media.economist.com/images/20090321/1209ST4.jpg" height="144" width="200" /></a></div>
If you saw an investment opportunity where you were guaranteed 100% return per year, would you take it? Incandescent bulbs (you know, the regular cheap kind) cost far more in electricity usage than the sticker price at the store. If you have them plugged in anywhere in your home, they are unnecessarily costing you more. If the sticker price at the store included the cost for the electricity they will consume over their lifetimes, no one would buy them. <br />
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So now for the investment pitch: replace all lighting in your home with LED lighting, and throw away the incandescent bulbs so nobody plugs them in by accident. The LED bulbs are at least 6 times more efficient, and will pay for themselves in savings in as little as 8 months.<br />
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(read in Jim Gaffigan audience voice) Throw away the incandescents? That's so wasteful!<br />
Nope. Plugging them in and having them waste energy ever again is way more wasteful. Send em to the landfill.<br />
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The bulbs will pay for themselves in savings - it's just a matter of time. to calculate the savings from a bulb purchase, you will need to know:<br />
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<ul>
<li>C = Your electricity cost. There is a standard rate on the bill, but don't forget to add in any taxes or per kwh fees. Mine works out to $0.14 after all taxes and fees.</li>
<li>H = How many hours per day the replaced bulb is used. for this example let;'s say 4 hours per day.</li>
<li>W = the old incandescent bulb wattage (usually 60)</li>
<li>N = the new wattage for the LED bulb (usually 9.5 for a 60W replacement)</li>
</ul>
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The savings per month are (H*W - H*N)/1000 * C * 30 </div>
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So in our example, the monthly savings will be around $0.85 per month. If I got the bulb for $5 (<a href="http://www.ikea.com/us/en/catalog/categories/departments/living_room/20514/" target="_blank">yes, $5, at Ikea</a>), the payoff period will be under 6 months. Every 6 months a little green leprechaun hands me $5. And all I had to do was replace a light bulb. Oh, and did I mention that these new bulbs will last 20 years?<br />
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Now that you are sold on this investment, you have the task of selecting the brand and type of bulb. Here are the standard ratings that differentiate what type of light the bulb you are getting:<br />
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<ul>
<li><b>Brightness</b>: All bulbs are measured in lumens. A 60W bulb from the dark ages puts out around 800 lumens. Anything from 700 to 900 will look similar in brightness.</li>
<li><b>Color</b>: The color of the light (or yellowness) is measured as a temperature, corresponding to the blackbody radiation spectra of a material heated to that temperature measured in Kelvin, or K for short. Soft white is the most common at 2700K. Bright white will be some higher number.</li>
<li><b>Color Rendering Index</b>: This is the accuracy of the bulbs attempt to replicate an incandescent bulb. A score of 100 would be perfect and no one could tell the difference. Some brands advertise this number, which is a good sign that they have done some engineering to get the bulb to put off good light.</li>
<li><b>Dimmable</b>: If you have a dimmer switch, make sure it says "dimmable" without the "not" in front of it somewhere on the package.</li>
<li><b>Enclosed fixtures</b>: If you are installing in a closed fixture, be sure that the packaging is marked as being rated for enclosed fixtures. The reason some bulbs will not work in enclosed fixtures is due to the heat being dissipated from the bulb. Although this is much less heat than an incandescent, it is enough to damage the bulb if it builds up in the fixture.</li>
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Here are a few bulbs that I have purchased and tested, and have found to have acceptable light color and brightness:</div>
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<ul>
<li><b>IKEA </b>- yes, IKEA has 700 lumen LED bulbs at $4.50. Some have a transparent case and look nice in exposed fixtures. They have a few different styles to choose from. Good light color and are dimmable too.</li>
<li><b>Phillips </b>- In my opinion the best brand for bulbs, but not cheap. I have Phillips for all my overhead recessed lighting. $12 to $20 each. Home depot stores in minnesota have some bulbs at reduced prices, thanks to subsidies from XCEL energy.</li>
<li><b>Feit </b>- $6 - $12 each - Costco had a deal on these last month. <a href="http://www.consumerreports.org/cro/search.htm?query=led+bulbs" target="_blank">Feit bulbs were among the best rated on consumer reports</a>.</li>
</ul>
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<span style="font-size: x-small;">While typing this I have completely forgotten to mention the real reason I am typing this blog, which is the fact that with each incandescent bulb that gets replaced by something more efficient, the ice caps will melt at least a little less fast. But even if you don't believe "science", there's no denying your wallet. </span></div>
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Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com1tag:blogger.com,1999:blog-8573446332082082334.post-52536259874309181562013-05-16T21:25:00.001-07:002013-05-16T21:26:47.544-07:00Personal Raspberry Pi Web Server<div class="separator" style="clear: both; text-align: center;">
<a href="http://static.comicvine.com/uploads/scale_super/7/73500/2420323-arnold_terminator.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="200" src="http://static.comicvine.com/uploads/scale_super/7/73500/2420323-arnold_terminator.jpg" width="150" /></a></div>
Hasta la vista, hosting fees! If you have a crappy website that maybe gets a couple visits per day, and you are paying more than $0.50/month for hosting, this project is for you. The Raspberry Pi is a small computer that can run a linux web server. <br />
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Based on some power consumption measurements seen online, this device should cost less than $3 per year in electricity, assuming $0.06 per kWH<br />
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My site,<a href="http://marvelle.org/"> marvelle.org</a> is currently running in this manner, although it is a pretty light-weight on the php end, only using php include commands. Joomla and wordpress page load times would be longer, although there are ways around this using built-in caching.<br />
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Step 1, <a href="http://www.element14.com/community/groups/raspberry-pi">buy a Raspberry Pi</a> (unless your brother got you one for your birthday - thanks Eric!)<br />
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Step 2, download the latest <a href="http://www.raspbian.org/">raspbian </a>release, and burn it to an SD flash card - you will need a card reader and software that can write an image to a flash card. Most laptops have built-in card readers now days. Some<a href="http://www.raspberrypi.org/downloads"> good instructions here</a> on creating the SD card image.<br />
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Boot up your pi. you can use a keyboard/mouse to do initial configuration, or you can wait for it to get a dhcp address from your router or firewall, and connect via telnet (I prefer to use <a href="http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html">PuTTY</a> for this).<br />
The default login details:<br />
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user: pi<br />
password: raspberry<br />
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CHANGE THE PASSWORD</div>
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<span style="font-family: Courier New, Courier, monospace;">sudo passwd pi </span></div>
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It will then prompt for a new password.</div>
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Give it a static IP. note this IP for when you configure port forwarding on your firewall.<br />
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Next, you can run the usual debian commands to get apache or whichever web server you want to use..<br />
<span style="font-family: Courier New, Courier, monospace;">sudo apt-get install apache2 php5 libapache2-mod-php5</span><br />
MySQL:<br />
<span style="font-family: Courier New, Courier, monospace;">sudo apt-get install mysql-server mysql-client php5-mysql</span><br />
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FTP:<br />
<span style="font-family: Courier New, Courier, monospace;">sudo apt-get install vsftpd</span><br />
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Next, take ownership of the web root:<br />
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<span style="font-family: Courier New, Courier, monospace;">sudo chown -R pi /var/www</span><br />
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Connect your ftp client to the PI, and transfer the files. The default directory is /var/www<br />
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Now for the DNS tricks to get this to work:<br />
Log in to your firewall - forward ports 80 and 443 to the Pi IP address. This makes it public, but you need DNS to let people find the Pi.<br />
Go to <a href="http://dnsdynamic.org/">dnsdynamic.org</a> and set up an account. Set up a free subdomain ( like boots.dnsid.org) - it will default to use your IP address. If your ip address changes, you will need to go back to the site to update it there, although it is a pretty easy process. There may be a way to automate this using a cron job... or you can also install the client for windows to update the address automatically (when the computer is running)<br />
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Next, log in to your registrar (godaddy, netsol...) and forward the domain with masking to your new dynamic dns address. The masking feature keeps the original address in the address bar, so users are not confused by your dnsdynamic address.<br />
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The change may take some time as dns changes sometimes do. make a small change to your old hosted location so that you can tell when it is loading from the pi. Or better yet, add a <a href="http://www.raspberrypi.org/trademark-rules">raspberry icon</a> to the new site!<br />
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Dial up your site, and if it works, cancel the old hosting plan. Then just wait 1 year to recoup investment in time and money.<br />
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Special thanks to others who have done this already;<br />
<a href="http://my-music.mine.nu/images/rpi_raspianwheezy_setup.pdf">http://my-music.mine.nu/images/rpi_raspianwheezy_setup.pdf</a><br />
<br />Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-23339826587594123602010-10-13T18:52:00.000-07:002010-10-13T19:57:42.065-07:00P.S.A. that can be viewed from Outer Space!<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvJXLatUvqkXn4i9mROpnwAB6Tv3MW_0bVQGEKvAwj8JVmjFSS0paEKGCU6Q0h62iNk_V7T1eZFevH1qK3-1PcYwgqz-Kz8eQgLi8D39FjXopyxP-rn7-CgAAR_kxex0PHoxJ8T9joqJ6B/s1600/vote.JPG"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 320px; FLOAT: left; HEIGHT: 233px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5527714664284989394" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvJXLatUvqkXn4i9mROpnwAB6Tv3MW_0bVQGEKvAwj8JVmjFSS0paEKGCU6Q0h62iNk_V7T1eZFevH1qK3-1PcYwgqz-Kz8eQgLi8D39FjXopyxP-rn7-CgAAR_kxex0PHoxJ8T9joqJ6B/s320/vote.JPG" /></a><br /><br />This is what my front lawn currently looks like from across the street. A giant reminder of every citezen's civic duty. (I'm hoping that those americans on the Mir space station have a way to mail their ballots, since <a href="http://voices.washingtonpost.com/debonis/2010/10/hacker_infiltration_ends_dc_on.html">online voting will not be available anytime soon</a>. )<br /><br /><br /><br /><br /><br /><br />Supplies for the project:<br /><ol><li>x-mas lights</li><li>extension cords</li><li>a light-sensetive power switch</li><li>Coat hangers</li></ol><p>I found it helpful to start with a scale drawing, and some quick estimaions on how many lights you need. The coat hangers will be turned into cord-steaks, to keep the lettering in place. Cut off the hook, and cut the middle of the flat bottom to end up with something resembling a mini croquet hoop. If you do not have enough coat hangers, go to the local cleaners and buy a dozen for a couple bucks. I used sheet-metal snips to cut the wire, but pliers would work too. The light-sensetive power switch costs $20 or so at your local hardware store - mine has options to turn on at dusk, and stay on for 2,4,6,8 hours, or until dawn. Be sure to pay attention to how many light strings you connect in series - this maximum should be listed on the packaging. Hopefully people will not try to steal/vandalize this rig. I have a Kieth Ellison sign, and so far have caught one potential thief red handed, have put it up after having it knocked over, and had to retrive it from the alley down the street after it was stolen.</p><p>Remember; Vote aerly, and vote often!</p>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-80918650649855708172010-09-29T20:40:00.000-07:002010-09-29T21:01:20.179-07:00Turn your Computer into an Electric Space Heater<a href="http://profile.ak.fbcdn.net/profile-ak-snc4/object3/1167/106/n106468981513_8096.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 199px; FLOAT: left; HEIGHT: 216px; CURSOR: hand" border="0" alt="" src="http://profile.ak.fbcdn.net/profile-ak-snc4/object3/1167/106/n106468981513_8096.jpg" /></a> Need a little extra heat in your house? Want to solve all of the worlds problems with minimal effort? Try leaving your desktop computer on all the time, while donating the would be wasted processor cycles to scientific research.<br /><br />Go to <a href="http://www.facebook.com/progressthruprocessors?v=app_4949752878">Progress through processors</a> to download the app and get started. The BOINC program automatically downloads and executes smaller pieces of a larger problem, and sends the results back to the lab. The program can be run with lowered security credentials, and has features that will suspend the projects when the computer is active (have it run as a screen saver). Be sure to turn off hibernation or auto-suspend.<br /><br />And while you are saving the world, try signing up for <a href="http://www.xcelenergy.com/Minnesota/Business/RenewableEnergy/Windsource_/Pages/Windsource.aspx">WindSource</a> (or similar program), to balance out any carbon guilt you might experience.<br /><br />Note: you can only use the "house heating" argument if you live in a cold climate, and at that, only half the year. If you live in a hot climate, chances are you are paying twice as much to do the same number of calculations. Although, you may find some of these projects worth the cost and donate the energy anyway.<br /><p>The waste heat from computers escapes into the room, and is just as energy efficient as any space heater. If you have the AC running, the waste heat will just make your AC run longer.</p>I live in Minnesota, so this is a win-win for 10 months out of the year!Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-86645897638487472052010-08-22T18:48:00.000-07:002010-08-22T21:03:58.700-07:00DIY Baby Toy Suspension<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguE2lyMDVRt52fUMsxaen5ZpuOVG9p9ku7SmM4tm7ZqIC9COuekgRpQJjhW5FUek03PZoycjZ-gz4BRw4I-XytwNbX8WqhlDUE7Rcbwi2hLLKemvjNa0sGXzcUTNZGywu_3mrmO-0M7UlH/s1600/IMG_3938.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 320px; FLOAT: left; HEIGHT: 240px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508447703602242386" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguE2lyMDVRt52fUMsxaen5ZpuOVG9p9ku7SmM4tm7ZqIC9COuekgRpQJjhW5FUek03PZoycjZ-gz4BRw4I-XytwNbX8WqhlDUE7Rcbwi2hLLKemvjNa0sGXzcUTNZGywu_3mrmO-0M7UlH/s320/IMG_3938.jpg" /></a> So, I got this baby, and she likes to reach for things, but my arm gets tired of holding toys over her, so I built this toy holder thing. I've seen these at Target for $40, but you could build this for $11 (cloth cover not included).<br /><br />I purchased 2 6ft rectangular steel stock: 1/2" x 1/8" for $4.69 each.<br />Also, a #6 bolt , washer and <span id="SPELLING_ERROR_0" class="blsp-spelling-corrected">wing nut</span> for $1 .<br /><br /><br /><span style="color:#ffff00;"></span><span id="SPELLING_ERROR_0" class="blsp-spelling-error">JC</span> sewed these green cloth covers, and secured them with bows.<br /><div></div><div><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhC6I79rYDLqpHabHPenCZ-wx00oVGqZGHnViUarKqmijLxkCU-gB-DiJmWKgXuvift-smPPtQ_3aUJArbWgb4GTQX2_-OfO7r3xeQsXk6WsqeTeF2R_cF12sp_pwX_QULJUY07CpLtxs-J/s1600/IMG_3933.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 320px; FLOAT: left; HEIGHT: 240px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508418573325749698" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhC6I79rYDLqpHabHPenCZ-wx00oVGqZGHnViUarKqmijLxkCU-gB-DiJmWKgXuvift-smPPtQ_3aUJArbWgb4GTQX2_-OfO7r3xeQsXk6WsqeTeF2R_cF12sp_pwX_QULJUY07CpLtxs-J/s320/IMG_3933.jpg" /></a><br /><br /><br /></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwj_TfD-uaXTn7FFj0wrtG1HEpIPJdEpyfi7wcKhRXPzsGXXf8Z-kuMjqcKHu7HZabQJNyQz2w8X8xVI9YeV-dJvlSl8USmiv6-Mfi4SFbdQNI3cNirhvtQoXFtDJhN9TzxNpfUfGWYgzR/s1600/IMG_3936.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 320px; FLOAT: left; HEIGHT: 240px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508418597529612322" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjwj_TfD-uaXTn7FFj0wrtG1HEpIPJdEpyfi7wcKhRXPzsGXXf8Z-kuMjqcKHu7HZabQJNyQz2w8X8xVI9YeV-dJvlSl8USmiv6-Mfi4SFbdQNI3cNirhvtQoXFtDJhN9TzxNpfUfGWYgzR/s320/IMG_3936.jpg" /></a><br /><br /><br />The toy suspender collapses for easy storage.<br /></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYt7U6ACEzNRbaxR6Jc2F_IZxuEsXvP8IO5YkCrQwKw0VWmjhzCF-ui_M7rjJw1k9rT0kO3eF9IezGnpoXC_wD6psnfNwNES0CmdMXxYbIkYQoq5bKOqo1LtTdllsV4ajx8zIMVeAcYEXD/s1600/IMG_3937.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 240px; FLOAT: left; HEIGHT: 320px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508418608053321746" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYt7U6ACEzNRbaxR6Jc2F_IZxuEsXvP8IO5YkCrQwKw0VWmjhzCF-ui_M7rjJw1k9rT0kO3eF9IezGnpoXC_wD6psnfNwNES0CmdMXxYbIkYQoq5bKOqo1LtTdllsV4ajx8zIMVeAcYEXD/s320/IMG_3937.jpg" /></a>The steel needs to be bent into a smooth arc, for which you will need a jig. I used a workbench with a couple of bearings bolted to it. I made the mistake of trying to bend this by hand, which put a couple of kinks in the metal. Once the jig was set up, I fed the metal through the 2 bottom rollers (pictured left) and bent it to the left of the top roller. When feeding it into the jig, The first bend made a kink in the metal, but at least it is the same for all 4 legs. The result was having 4 sections of straight metal on the ends, with the center sections having a smooth arc.<br />Steel will retain a camber with a curvature less than that of the jig you feed it through. If you can, increase the curvature with multiple runs. (I was not able to do this with my setup... since the adjustment knobs were maxed out with the exact curvature I needed.)<br /><br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9cjBhsVj73Dx90xK0IaJJ27QmeO0W1DjIgcvwgHdUP_qVkO7zElqJJfhNBcJ0zzf9f47PVksXxpBVi2TfJys7pU_s3x9vs_wPUu_Okv1lzuIB-ecMACrbZMqFFexD-nNauVewq0tfuVIK/s1600/IMG_3932.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 320px; FLOAT: left; HEIGHT: 240px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508418561753462066" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9cjBhsVj73Dx90xK0IaJJ27QmeO0W1DjIgcvwgHdUP_qVkO7zElqJJfhNBcJ0zzf9f47PVksXxpBVi2TfJys7pU_s3x9vs_wPUu_Okv1lzuIB-ecMACrbZMqFFexD-nNauVewq0tfuVIK/s320/IMG_3932.jpg" /></a><br /><br /><br /></div><p>Here is the center bolt+wing nut. Use a drill bit with the same gauge as the bolt for a snug fit.</p><div><br /><br /></div><p></p><div><br /><br /><br /><br /><br /><br /><br /><br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlM6WiBxwfRafE3euLJtBj6T2H92cqjrSELDaY2MLRCEyi4uclMZP-OYzZx-dzahUvsI4SfrrZdOwgE2_Rgordv2ZBBpDIgLLu2EIdfFWItXZLEAaFfW-Gee4ifz-XHYHQtHkUsGiPraUC/s1600/IMG_3934.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 240px; FLOAT: left; HEIGHT: 320px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508418583689724066" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlM6WiBxwfRafE3euLJtBj6T2H92cqjrSELDaY2MLRCEyi4uclMZP-OYzZx-dzahUvsI4SfrrZdOwgE2_Rgordv2ZBBpDIgLLu2EIdfFWItXZLEAaFfW-Gee4ifz-XHYHQtHkUsGiPraUC/s320/IMG_3934.jpg" /></a><br /><br />I wrapped the feet in electrical tape for safety.<br />If you plan on using this on wood floor, you will need to tie the opposite ends of the rods together. The downward pressure from gravity and baby grabs will cause the legs to spread out. Putting this on carpet creates enough friction on the feet.<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9cjBhsVj73Dx90xK0IaJJ27QmeO0W1DjIgcvwgHdUP_qVkO7zElqJJfhNBcJ0zzf9f47PVksXxpBVi2TfJys7pU_s3x9vs_wPUu_Okv1lzuIB-ecMACrbZMqFFexD-nNauVewq0tfuVIK/s1600/IMG_3932.jpg"></a></div><div><br /></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilJ-f3HF1XCSm7MeWRvF2aignoFyoP2cLr1sw_oyQB0ODIgsyordZ6-mor431xBioPUGQJhnsW3u87S_WA9dW1VEwJNORG5APJTs8YJJIqecDUFPIB6e3PkVl5Nlt04p1WPf6s3AXFh_5B/s1600/IMG_3944.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 240px; FLOAT: left; HEIGHT: 320px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5508447709648899874" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilJ-f3HF1XCSm7MeWRvF2aignoFyoP2cLr1sw_oyQB0ODIgsyordZ6-mor431xBioPUGQJhnsW3u87S_WA9dW1VEwJNORG5APJTs8YJJIqecDUFPIB6e3PkVl5Nlt04p1WPf6s3AXFh_5B/s320/IMG_3944.jpg" /></a>Now for hours of baby <span id="SPELLING_ERROR_3" class="blsp-spelling-error"><span id="SPELLING_ERROR_1" class="blsp-spelling-error">overstimulation</span></span>!<br /></div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9cjBhsVj73Dx90xK0IaJJ27QmeO0W1DjIgcvwgHdUP_qVkO7zElqJJfhNBcJ0zzf9f47PVksXxpBVi2TfJys7pU_s3x9vs_wPUu_Okv1lzuIB-ecMACrbZMqFFexD-nNauVewq0tfuVIK/s1600/IMG_3932.jpg"></a>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-37633595722934156362010-04-24T19:42:00.000-07:002010-04-27T19:15:46.742-07:00Power your bike lights with Faraday's law!<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipxoz0bhMBGQZpABx3_8bCy4GfvV0nthIV4Hc7rYmIKr8MUwMgpNLI95LKlEkieu6Mta9i3EXOgYF0aUHzIDYwGr4OIN5NM22NOaZLCy4CmoBjQbhkX1K662lFJaOSdOd01dQwKZdyI5Iv/s1600/IMG_2888.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 295px; FLOAT: left; HEIGHT: 211px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464307019755320226" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEipxoz0bhMBGQZpABx3_8bCy4GfvV0nthIV4Hc7rYmIKr8MUwMgpNLI95LKlEkieu6Mta9i3EXOgYF0aUHzIDYwGr4OIN5NM22NOaZLCy4CmoBjQbhkX1K662lFJaOSdOd01dQwKZdyI5Iv/s400/IMG_2888.jpg" /></a> Is this a UFO? Why do the lights blink so consistently as a function of distance? Why not just get a battery?<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><div><br /></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRsdy_53Mkad7ni2TsVPhLCfFO9xFr2iy_JzQrm1rngM50Ci3mkIlnR12gcaxavVPuSWeVLmTHQCBPis9rs3kefoO9nLpjA_QnHHq1TfvJZewb5EDkESqWSliHImOE8HO5tfrlzj2_6gfB/s1600/IMG_2877.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 202px; FLOAT: left; HEIGHT: 264px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5463905796234344850" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRsdy_53Mkad7ni2TsVPhLCfFO9xFr2iy_JzQrm1rngM50Ci3mkIlnR12gcaxavVPuSWeVLmTHQCBPis9rs3kefoO9nLpjA_QnHHq1TfvJZewb5EDkESqWSliHImOE8HO5tfrlzj2_6gfB/s400/IMG_2877.jpg" /></a> A project of mine for a while has been to set up a lighting system for my bike that did not require batteries. You have seen the old-fashioned Schwinns with the generator on the back wheel going to the headlight. This is the same idea, except the entire back wheel becomes the generator. As the magnets pass by the coils, the changing field generates a (small) current, in quantities defined by <a href="http://en.wikipedia.org/wiki/Faraday">Faraday's law</a></div><div><br /></div><div></div><div><br /></div><div>The materials needed for this setup:</div><div><br /></div><div>4 cheap guitar pickups </div><div>8 neodymium bar magnets (I got mine <a href="http://kjmagnetics.com/proddetail.asp?prod=BX884">here</a>)<br />8 x Nylon 1/4" bolts w/ nuts</div><div>8 nuts and 8 bolts (bolts must have high iron content.)</div><div>2 Aluminum bars 1/8" x 1/2" X 5" long to attach the guitar pickups</div><div>20' of cheap speaker cable</div><div>16 rectifier diodes</div><div>1 box of LED color christmas lights</div><div>1 x 6000uF - 15000uF 20V Capacitor (axe-man)</div><div>1x 50uF 50V capacitor</div><div>1 x magnetic reed switch</div><div>6 x 800 - 1500 ohm resistors</div><div>1 x 100 ohm resistor</div><div>soldering iron / solder</div><div>wire strippers</div><div>a breadboard for testing configurations<br />a volt meter</div><div>lots of spare time<br /></div><div>I have mounted neodymium magnets on the spokes, and mounted 4 cheap guitar pickups on the rear horizontal fork. The rusty bolts seen to the left were selected for their high iron content, which helps to conduct the field to the coils (a little wd-40 would have helped stop the rust). The other side has 2 aluminum support bars, with 2 copper pipe holders to attach it to the bike frame. Aluminum was not the best choice, since the field-effect will slow down the wheels. If you find a strong plastic, use that instead.<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiiaxyzjfR5CpedHGOJ0BRayMrNBYrb9UHdQCUWNNQNklVfLqsfA_NjS-Uput1lTfJw_PlC10l0RkF66xiVbTDWwEtgb3RT50bYIJwRSAeQsOiOeWFx0A3PrTC4kU1tjDnowpFIhIMm4D3d/s1600/IMG_2875.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 281px; FLOAT: left; HEIGHT: 238px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464295049838776242" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiiaxyzjfR5CpedHGOJ0BRayMrNBYrb9UHdQCUWNNQNklVfLqsfA_NjS-Uput1lTfJw_PlC10l0RkF66xiVbTDWwEtgb3RT50bYIJwRSAeQsOiOeWFx0A3PrTC4kU1tjDnowpFIhIMm4D3d/s400/IMG_2875.jpg" /></a><br /></div><div>Believe it or not, the hardest part of this whole operation was getting the magnets to stay on the spokes while riding. I used nylon bolts, since I could saw them in half and put the nut on the other side of the spoke to clamp on to the spoke. The head of the bolt is mighty-puttied to the magnet. The ones that did not fall off within a week have lasted 2 years , and I have 4 of 8 left. The wheels get jerked around when you ride, so what ever method you use to attach these has to be good. If you use glue or putty, be sure to score the magnet and bolt surface before gluing.</div><div><br /></div><div></div><div><br /></div><div>The other consideration is the distance from the magnet to the coil as it passes by. The closer the better, but you will find that the wheel flexes when you turn, which will change that distance and maybe even cause the parts to collide. I keep mine about 5-8mm away.<br /></div><div>Once the coils and magnets are mounted in place, the next step is to start on the circuitry.</div><div><br /></div><div>Step 1: build a rectifier circuit that will take the AC pulses from the coils, and smooth them out with a low-pass filter to a safe DC voltage for that mega-capacitor you bought. Here is a crude circuit diagram (anyone have a good free circuit-drawing tool that runs on xp?)<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcihfxavQLfCw_UaLc6ww9wzI8vsJXHeu6fdoEOpO3lg4WU6ezrvX-xG5u3W3hNd6EPFYs9MQzqbayFSv3uVuw1mjIHqePqpAf5l__zBMTTYDnJkMFjaf0z5eiuOAwzJujPwey4uG-cf1r/s1600/circuitry.png"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 400px; FLOAT: left; HEIGHT: 347px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464295057554581778" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcihfxavQLfCw_UaLc6ww9wzI8vsJXHeu6fdoEOpO3lg4WU6ezrvX-xG5u3W3hNd6EPFYs9MQzqbayFSv3uVuw1mjIHqePqpAf5l__zBMTTYDnJkMFjaf0z5eiuOAwzJujPwey4uG-cf1r/s400/circuitry.png" /></a></div><div><br /></div><div>The squiggles are the coils (there are 4, but I only drew 2...), representing an AC voltage source.</div><div><br /></div><div>The arrows with the lines are the rectifier diodes. Each wire from a coil gets 2 diodes opposing in polarity. match all the diodes of 1 polarity together to form 2 main leads coming from the coils (a + and a -)</div><div></div><div>Step 2: the low-pass filter<br /></div><div>The 1st capacitor on the left is the 50V/50uF - make sure this has a rating of 50V or more, since the coils can produce spikes that will short out smaller caps. The 100ohm resistor drains the voltage to the main cap between spikes. </div><div></div><div>Step 3: charge the main capacitor:</div><div>The Main cap should have a rating of 20V or more, with 6000uF of capacitance (for those confused while shopping, MFD is the same as uF ) Get the capacitors attached to the breadboard , and get <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjY_oyg8hgNctTrEUj16hyphenhyphen7QH9xLA1Xw3KlkRy0uHsiFSFftpvveT5DNbR4tOdgmL_MjNNHR5HZKcQSHKWYX9CDj9ZCUTphYe5VjaJtjU8AWZmFuDAV_MKTDhav-7SS0GT3Kz6xI-E8rn28/s1600/IMG_2881.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 186px; FLOAT: left; HEIGHT: 262px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464295082757397154" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjY_oyg8hgNctTrEUj16hyphenhyphen7QH9xLA1Xw3KlkRy0uHsiFSFftpvveT5DNbR4tOdgmL_MjNNHR5HZKcQSHKWYX9CDj9ZCUTphYe5VjaJtjU8AWZmFuDAV_MKTDhav-7SS0GT3Kz6xI-E8rn28/s400/IMG_2881.jpg" /></a>the polarity figured before you solder anything. </div><div></div><div>Step 4: the magnetic reed switch:</div><div>Attach the magnetic reed switch on the rear fork somewhere in the vicinity of a passing magnet. This will be the strobe driver for the lights. As you can see on the left, electrical tape works just fine to secure this light-weight component. When in the presence of the magnetic field, the switch is pulled to the closed position. </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div> </div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOYtLdA5YVnaszeIdaS9I5AREy5ORNh3wIs4FY4VJSveYkz0EpttTBlsYwH19bGzYn45taSQr99UCpO-cYe9Q9jFLm8hdn_7VUPRU5Ayp7ZOnXskeGQNdEQbLMjJat5oQtBtjZojoCL19D/s1600/breadboard2.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 195px; FLOAT: left; HEIGHT: 239px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464295073236926274" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOYtLdA5YVnaszeIdaS9I5AREy5ORNh3wIs4FY4VJSveYkz0EpttTBlsYwH19bGzYn45taSQr99UCpO-cYe9Q9jFLm8hdn_7VUPRU5Ayp7ZOnXskeGQNdEQbLMjJat5oQtBtjZojoCL19D/s400/breadboard2.jpg" /></a></div><div>Step 5: testing out the lights:</div><div>This next photo shows the breadboard in use. You can mix-and-match to a certain degree with LED's, but using only the LEDs from the xmas lights will allow you to assume that all of the lights have the same voltage drop and current draw. The 6 800-Ohm resistors are for equally dividing the current between all the LEDs, and keeping the lights from draining the capacitor right away. To organize this, I soldered a collection of 5 resistors to the positive lead of the main capacitor, and attached the wires going to the diodes from there. The advantage here is that a pair of diodes can share a negative lead, requiring only 3 wires for 2 led's. I put 2 LEDs in the back, 2 in the middle, and 1 in the front. </div><br /><br /><br /><br />Step 6:<br />Solder the connections and manage the wires. - Be sure that the wires do not interfere with the break or shifting cables. Electrical tape works well. Get the wires in place and taped before soldering. wires that ware twisted together will not stay that way (and the oxidize too), so soldering is mandatory.<br /><br />Tips:<br /><ul><li>The LEDs are polar, so be sure to keep track of this when soldering. </li><li>mark the polarity on the wires to save time. (often I will use copper for positive, and steel for negative)</li><li>If people start conversations with you about how this is "green", inform them that far more energy went into the manufacturing these components than will ever be generated by them. My computer has even surpassed the amout generated while writing this blog. If your friends want to be green, have them all write a letter to our delegates urging them to cover Minnesota in windmills and solar panels, and to pay for it by taxing carbon.<br /></li><li>don't try to look at the lights while riding, as this can be distracting and cause accidents.</li><li>have someone take a long exposure photo of you going by at different speeds.</li></ul><p><br /><breadboard...><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZiHP2pcM8EUOkBJ2M8ApsZjQnkug6KbuYNKZ3R8PvaOfjlo_05j92kHj8C-BbK_jcvyDpozPKDIrUmI6OA4FQf-4elEvTUuRZhp8cv0NV1AEPIxkXG0s8LZENJ16isXhiBMAt3SZ0ZLFX/s1600/IMG_2883.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 300px; FLOAT: left; HEIGHT: 400px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5464295067503731282" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZiHP2pcM8EUOkBJ2M8ApsZjQnkug6KbuYNKZ3R8PvaOfjlo_05j92kHj8C-BbK_jcvyDpozPKDIrUmI6OA4FQf-4elEvTUuRZhp8cv0NV1AEPIxkXG0s8LZENJ16isXhiBMAt3SZ0ZLFX/s400/IMG_2883.jpg" /></a> </p><p></p><p></p><p></p>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-83084308167513856502010-02-13T19:25:00.000-08:002010-02-14T19:24:54.286-08:00Fractal Koch Curve Radio Antenna<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDpL5VKhq6hfyAYnvCtCm2Wt3PLyD_DOyvnzo5TdPvlkZAz2j1PBQbFVEeYdYCVyCNZubq9VpBStPVMOWTZuyUuAUc9BO8nI6Dj6B4gZ3IgGwao_Ljn-1yPXlg0CTEu8I333Z-mnyAcGWr/s1600-h/Picture+002.jpg"><img style="MARGIN: 0px 10px 10px 0px; WIDTH: 274px; FLOAT: left; HEIGHT: 400px; CURSOR: hand" id="BLOGGER_PHOTO_ID_5438281491482229730" border="0" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDpL5VKhq6hfyAYnvCtCm2Wt3PLyD_DOyvnzo5TdPvlkZAz2j1PBQbFVEeYdYCVyCNZubq9VpBStPVMOWTZuyUuAUc9BO8nI6Dj6B4gZ3IgGwao_Ljn-1yPXlg0CTEu8I333Z-mnyAcGWr/s400/Picture+002.jpg" /></a><br /><div>Want a radio antenna that will perform better than an antenna of similar size, and look pretty too?</div><div><a href="http://en.wikipedia.org/wiki/Fractal_antenna">Fractal antennae</a> have been around since 1988, and can now be found in most cell phones. The basic idea is that any self-similar shape will produce better results for broad-band antenna design. See more information on this invention <a href="http://www.fractenna.com/nca_cohen_bio.html">from the inventor himself.</a></div><div> </div><div>This antenna is based on the <a href="http://en.wikipedia.org/wiki/Koch_snowflake">koch curve</a>, which is a special case of the <a href="http://en.wikipedia.org/wiki/De_Rham_curve">DeRahm curve</a> .</div><div> </div><div>To start, download <a href="http://en.wikipedia.org/wiki/File:KochFlake.svg">the graphic from wiki</a>, and edit the 4th iteration to fit on a 8.5x11 sheet of paper. (I like to use <a href="http://www.gimp.org/">Gimp</a>, but you may have another preference.)</div><div> </div><div>Print the rsult, and pin it to a cork board. Using pins, place a pin at each point on the curve. You will need to find a wire that is at least 8x((4/3)^3) + x inches long (about 18.96 + x"), x is to reach the radio, 3 feet , so make it 4 or 5 feet long. 8*(4/3)^3 represents the length of the triangle side at the first iteration, 8", multiplied by 4/3 for each iteration. Three iterations will increase the length by a factor of 4/3 to the 3rd power.</div><div> </div><div>Next, you will put a pin at each point, and wrap the wire around that point. try to keep the wire exactly on the printed design. It helps to tape it down as you go to solidify your work. (I used packaging tape so the design is visible) This will take some time to complete (I took 2 hours or so...)</div><div>If you want to play around with self-similar shapes, there are some <a href="http://www.nahee.com/spanky/www/fractint/fractint.html">free fractal generators </a>out there. Perhaps a <a href="http://local.wasp.uwa.edu.au/~pbourke/fractals/gasket/spongea.html">3d-fractal</a>, a <a href="http://i.gizmodo.com/5286457/makerbot-cupcake-cnc-delivers-diy-3d-printing-for-just-750?autoplay=true">3d printer </a>with conductive plastic, and bam, youve got a 3d fractal antenna!</div><div> </div>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-21777688357260722112010-01-21T21:09:00.000-08:002018-07-11T08:44:26.018-07:00Build your own Van de Graaff generator!<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXzOCHN945L5zyyrT_TU1bJ7kbuMdI24h8wz_7Fnq-7PBzrGhLpCZhKIkp5IumtAauQng_4jUUlJTk60ENrxzLRsKgu7U-TR0CMPnUN4l7ZSR7SCCwEk6CJj92IMv3Mm7l3zarwUejxQ-N/s1600-h/Van_de_Graff.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429782435648253730" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXzOCHN945L5zyyrT_TU1bJ7kbuMdI24h8wz_7Fnq-7PBzrGhLpCZhKIkp5IumtAauQng_4jUUlJTk60ENrxzLRsKgu7U-TR0CMPnUN4l7ZSR7SCCwEk6CJj92IMv3Mm7l3zarwUejxQ-N/s400/Van_de_Graff.jpg" style="cursor: hand; cursor: pointer; float: left; height: 400px; margin: 0 10px 10px 0; width: 208px;" /></a><br />
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Last year I set out to build a van de graff generator, and after a year of tweaking, I have something that works (most of the time).</div>
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The first step in building these is understanding the principles of how it works. I will attempt an explaination here, but please check out the wikipedia <a href="http://en.wikipedia.org/wiki/Van_de_Graaff_generator">here</a>.</div>
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The charges for this machine accumulate on smooth conductive surfaces, which is the reason for the large metal globe at the top. Generally, the larger the globe, the higher the voltage. Inside the tube, there is a belt with 2 rollers. The belt is made from some electrically neutral material that is also an insulator (latex). The rollers are made from materials that have opposite polarizations in the <a href="http://en.wikipedia.org/wiki/Triboelectric_effect">triboelectric</a> series. I chose aluminum(+) and silicone rubber (-).</div>
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When the belt comes in contact with one of these materials, electrons are either pushed to one side of the belt, or pulled from one side. In the case that electrons are pulled from the other side, the metal brush is there to provide replacement electrons. (the reverse is collecting the extra electrons). The belt moves along over the roller, and eventually seperates from the roller. When the belt is seperated from the roller, it will then have a charge on the outside of the belt. (for those concerned about the conservation of energy, dont worry. The work of seperating the clingy-belt from the roller equals the charge on the belt.)</div>
A couple of mechanical challenges when building this:<br />
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<li>Attaching the bearings to the pvc pipe so they do not move.</li>
<li>keeping the belt on the rollers</li>
<li>keeping the brushes in place</li>
<li>attaching the bottom roller to the motor</li>
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These are not really challenges for those that are mechanically inclined, but I found <a href="https://www.mightyputty.com/">mighty-putty</a> to of use in a couple of places.<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtHugweSO-MEYIKjhxSDV1WPC1Q4vaTQ3MnU3z8nly1vqeWvUcXDd5_HYKCScHS-d-SBqVH81i-aimmLR-FOsapIJB4THqzGMa-uTOPDwoYxfACt62ZV38Hj6qLm59FCw4CvfDFtlZ01sq/s1600-h/globe_hole.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429664697442454802" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtHugweSO-MEYIKjhxSDV1WPC1Q4vaTQ3MnU3z8nly1vqeWvUcXDd5_HYKCScHS-d-SBqVH81i-aimmLR-FOsapIJB4THqzGMa-uTOPDwoYxfACt62ZV38Hj6qLm59FCw4CvfDFtlZ01sq/s320/globe_hole.jpg" style="cursor: hand; float: left; height: 112px; margin: 0px 10px 10px 0px; width: 320px;" /></a>Lets start with the metal globe at the top. This is essentially 2 <a href="http://www.ikea.com/us/en/catalog/products/50057254">14" steel salad bowls from ikea</a>. a hole is cut in one of them for the pvc pipe to fit into, and they are taped together inside and out with aluminum tape. after you cut the hole, use a file to take off any sharp edges with a file.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip-hGOZV3IvALnuXzjoGO4QN7TbSR0PRHholxnYMN3MsRQYLcu5APHK_GRDkGc-H_essPiEuRDs-RJk7MVUbcJyGjjo3tNuI8z49slAEVGBlV83okL7huiESwR1qAhV6XGRr7Cc1dJZ0AE/s1600-h/brush_top_connect.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429775549471796850" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip-hGOZV3IvALnuXzjoGO4QN7TbSR0PRHholxnYMN3MsRQYLcu5APHK_GRDkGc-H_essPiEuRDs-RJk7MVUbcJyGjjo3tNuI8z49slAEVGBlV83okL7huiESwR1qAhV6XGRr7Cc1dJZ0AE/s400/brush_top_connect.jpg" style="cursor: pointer; height: 190px; width: 400px;" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip-hGOZV3IvALnuXzjoGO4QN7TbSR0PRHholxnYMN3MsRQYLcu5APHK_GRDkGc-H_essPiEuRDs-RJk7MVUbcJyGjjo3tNuI8z49slAEVGBlV83okL7huiESwR1qAhV6XGRr7Cc1dJZ0AE/s1600-h/brush_top_connect.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"></a>The globe will be detachable, and connected to the brush by alligator clip. The wire must be inside the globe; The reason being, that the globe becomes the center of an electric field. If it has conductive points on the outside of the globe that are not smooth, they will spew electrons in a process called <a href="https://en.wikipedia.org/wiki/Corona_discharge">corona discharge</a>. What you really want is <a href="http://en.wikipedia.org/wiki/Electrical_breakdown">electrical breakdown</a>, which is more impressive.</div>
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Get a PVC pipe, and cut to about 4 or 5 feet. (if you have high ceilings, use a 6 foot pipe)</div>
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Cut a U shape into each end to mount the bearings on. Make sure the u-shaped cuts are lined up, which will line up the belt rollers for less friction. The bearings should fit snugly, so they do not vibrate.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLxSnetA_Mvxcg7ErBzrlk0wzQM8cGUyxzXtW7WMjwGVFGJ9e26YdlrAie7E7mCW0H4Qq081tLN-XViP1Igc0BtiOD2XvgN4mCwZYqEH6cTv0CT2GmsdawrwdFNt2IqHl4PdVG2SFinFJa/s1600-h/brush_top2.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429666864187409570" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLxSnetA_Mvxcg7ErBzrlk0wzQM8cGUyxzXtW7WMjwGVFGJ9e26YdlrAie7E7mCW0H4Qq081tLN-XViP1Igc0BtiOD2XvgN4mCwZYqEH6cTv0CT2GmsdawrwdFNt2IqHl4PdVG2SFinFJa/s400/brush_top2.jpg" style="cursor: hand; height: 238px; width: 400px;" /></a></div>
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Keep in mind you will be putting the metal globe over the top roller. For that reason, I used mighty-putty on the top roller to attach the axle to the bearing:<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEhgSwldOKjh4piJi2rBzXSCf-qbr8Avbs1Lhug7LcKlSIXMs3vvYzw8fJ2n2f6wSkKqR0hKu6Z0GdeFDVOCsHQyKMsgl2moQI4f503r3bBkmVjzVypUCQDL8dp439S1F114mJaBLLq1-V/s1600-h/brush_top.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429666865621003330" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgEhgSwldOKjh4piJi2rBzXSCf-qbr8Avbs1Lhug7LcKlSIXMs3vvYzw8fJ2n2f6wSkKqR0hKu6Z0GdeFDVOCsHQyKMsgl2moQI4f503r3bBkmVjzVypUCQDL8dp439S1F114mJaBLLq1-V/s400/brush_top.jpg" style="cursor: hand; height: 161px; width: 400px;" /></a></div>
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To make the roller, I used a 5/16" x 6" carraige bolt as the axle. For the top roller, I cut off the head. The bearings are held in place by bolts. (btw, axeman is a good place to get cheap bearings) The roller was made from a rubber sanding drum drill attachment, which was cut to size, and then screwed onto the bolt. The drum is then wrapped with electrical tape (or any tape you like) to give it the right shape. You want a "crown" in the middle of the roller, as the belt will naturally tend towards the center of the crown. (this is how you keep the belt on the roller)<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDLnmeX3zbhy13q2Hgn3IDkZPyhkQY_y_ytZBIReLtOte4sKQVaoSERtoWw-YqrUIy359Ty_kM-tNl1SPmOJA3l1xy1jScdmdHQRH4NwZb1jp1R5-ZACmXztO58CID5aTynkqv4tTmImIE/s1600-h/aluminum_roller.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429666871677246386" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDLnmeX3zbhy13q2Hgn3IDkZPyhkQY_y_ytZBIReLtOte4sKQVaoSERtoWw-YqrUIy359Ty_kM-tNl1SPmOJA3l1xy1jScdmdHQRH4NwZb1jp1R5-ZACmXztO58CID5aTynkqv4tTmImIE/s400/aluminum_roller.jpg" style="cursor: hand; height: 176px; width: 400px;" /></a></div>
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The bottom roller (above) has an extra rubber roller with a notch to hold the drive-belt.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUsYDg_s7tbh5mAx9Yml7mQu7-uk1_SiHyjeYNpUkPdmdLVU4Z9llktcoYuV49e4DYFbGGrB8lYqDhNWUVoFCT4Nxc7gbMcMVUVCUl1cVmiLc0VA9Z98o6UPv9aOnnhr2RI3GqENNhB6pU/s1600-h/Al_tape.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429775564862860674" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiUsYDg_s7tbh5mAx9Yml7mQu7-uk1_SiHyjeYNpUkPdmdLVU4Z9llktcoYuV49e4DYFbGGrB8lYqDhNWUVoFCT4Nxc7gbMcMVUVCUl1cVmiLc0VA9Z98o6UPv9aOnnhr2RI3GqENNhB6pU/s400/Al_tape.jpg" style="cursor: pointer; height: 168px; width: 400px;" /></a></div>
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Aluminum Tape, usually used for ventilation ducts. Used to cover the bottom roller, and seal the globe halves together.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEie-DVgaY_f-xqn_Tm3uWoD976t3LqPnyBHSS5Tcqs9178u3rVM02DurGgWxjwTGw6GJfUfhpqMxVW9rmIYVwyI9MnLZRjKFJ3ayvrOfFpo5jUYQV_mJXVAg1pZ9W4o-ospVLUJ9GhHN4DI/s1600-h/Si_tape.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429775560525605250" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEie-DVgaY_f-xqn_Tm3uWoD976t3LqPnyBHSS5Tcqs9178u3rVM02DurGgWxjwTGw6GJfUfhpqMxVW9rmIYVwyI9MnLZRjKFJ3ayvrOfFpo5jUYQV_mJXVAg1pZ9W4o-ospVLUJ9GhHN4DI/s400/Si_tape.jpg" style="cursor: pointer; height: 181px; width: 400px;" /></a></div>
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Silicone tape, used for plumbing, used to cover the top roller.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHjZWlnCbFKnCtV6gXhPxqOoTMvCl_8khTmCXC2CZyW55bzG2-pJ8Ck74sxXp72XjI0-gx3OX-wsW9GP6kCKILRKjXZ5PQB1iER1L9nkthND1yngDH-snghGRqDOr4BLkORQFOwKSk32Z5/s1600-h/brush_bottom.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429666857213227682" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHjZWlnCbFKnCtV6gXhPxqOoTMvCl_8khTmCXC2CZyW55bzG2-pJ8Ck74sxXp72XjI0-gx3OX-wsW9GP6kCKILRKjXZ5PQB1iER1L9nkthND1yngDH-snghGRqDOr4BLkORQFOwKSk32Z5/s400/brush_bottom.jpg" style="cursor: hand; height: 285px; width: 400px;" /></a><br />
A toilet flange holds the pvc pipe upright. This is bolted to a wooden base, purchased from the IKEA damaged goods section. The brushes are made from braided copper grounding wire. Aluminum tape holds the brush in shape, and a screw/washer attaches it to the pipe, allowing you to align the brush before assembly. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiG5C76CYKS4iJDdANa1Ja0EUIYrrQ77E1q_KjY-pkxAT-BDsxPwrdfMONFJpfMG58xrTKLf0cWSDW0jnsgzAr4MmJkoxFhVNwr6pB9nHzkVkEMHA9vO5poucrWvZ5NQkBvBcEXNczlCSWN/s1600-h/bottom_bearing.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429666854823526482" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiG5C76CYKS4iJDdANa1Ja0EUIYrrQ77E1q_KjY-pkxAT-BDsxPwrdfMONFJpfMG58xrTKLf0cWSDW0jnsgzAr4MmJkoxFhVNwr6pB9nHzkVkEMHA9vO5poucrWvZ5NQkBvBcEXNczlCSWN/s400/bottom_bearing.jpg" style="cursor: hand; height: 120px; width: 400px;" /></a></div>
The bearings for the bottom roller are held in place by plastic inserts.<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgl2MIUyacUszyTHl73RUcW8L0pwgTRSrzb4vDq4b3dD4qS2FOP1kpA084y0tYC2Gfp9q1-CHJjroJd5xmiiXaBkcCHlkTYGjSXjkifg1CmzpHntAX9Btutfj07dKbG6r0J4PnZS8g4kzeT/s1600-h/belt1.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429766516530838914" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgl2MIUyacUszyTHl73RUcW8L0pwgTRSrzb4vDq4b3dD4qS2FOP1kpA084y0tYC2Gfp9q1-CHJjroJd5xmiiXaBkcCHlkTYGjSXjkifg1CmzpHntAX9Btutfj07dKbG6r0J4PnZS8g4kzeT/s400/belt1.jpg" style="cursor: pointer; height: 313px; width: 400px;" /></a><br />
The latex belt is made from one of those pilates yoga straps, but get the heavy-duty-tension version, for more durable, thicker latex. After the rollers and the bearings can be mounted, you will have an idea of how long to cut the belt. Make the belt 10% shorter than it needs to be, so that it will stretch and have some tension when it is on the rollers. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTToZLIbh3R-YUnYsMcUGnSmmxVW4GqucLVqGUZ3SKtOncSmBGSuYhzQxy9MbVtPqxi1pcSJC49ocpz04gmiaJmz6_3Za1CDs5Kr7op0iUwzfp2MPkpLAAeaX654mQnuJIJkziXHCUSCc6/s1600-h/belt2.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429766517563082226" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTToZLIbh3R-YUnYsMcUGnSmmxVW4GqucLVqGUZ3SKtOncSmBGSuYhzQxy9MbVtPqxi1pcSJC49ocpz04gmiaJmz6_3Za1CDs5Kr7op0iUwzfp2MPkpLAAeaX654mQnuJIJkziXHCUSCc6/s400/belt2.jpg" style="cursor: pointer; height: 177px; width: 400px;" /></a></div>
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Use rubber cement to glue one end to the other. Cut on the diagonal for a stronger bond and less of a chance it will catch on a brush. When you put the belt on, make sure it is facing in the direction in which the seam will not catch on the brush.</div>
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<span class="Apple-style-span" style="font-size: large;">Next, the electronics</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjSypsfxoHoYaIWXLyUUscNkUpUduW-58Ji97pfcKLsaRMbpbNSwCcDPtDRghLueAOx9pZG9j53C6UONXsB6TNSQK5NZjMJUFXzl4-gHnS1zrG31L_l_kvvEiBs3Gts_YyaMnqL9m1_b7I/s1600-h/electronics.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429771498855294594" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhjSypsfxoHoYaIWXLyUUscNkUpUduW-58Ji97pfcKLsaRMbpbNSwCcDPtDRghLueAOx9pZG9j53C6UONXsB6TNSQK5NZjMJUFXzl4-gHnS1zrG31L_l_kvvEiBs3Gts_YyaMnqL9m1_b7I/s400/electronics.jpg" style="cursor: pointer; height: 363px; width: 400px;" /></a></div>
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Go to axeman or other surplus/hobby store to get a 120V AC 2-pole motor. Most hardware stores will have dimmer switches. You can buy 3-prong plugs and wire, but most likely you have this already. Be sure to look up which wire is hot, neutral, and ground. The hot should go to the switch first.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggrXBe5yLbs8ghyISbgwUAkQLVegv6h_MkZtzpPpv7vOwAio-EF0U2gf06tz6IsTK171ZzzEEozyYPge1_Cmcs6iZWepzQD88PfBqRNAbD72O2HCuENrgOrPfV2pfvTOOXbPcVku8kUuXD/s1600-h/Picture+004.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429771505281660098" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggrXBe5yLbs8ghyISbgwUAkQLVegv6h_MkZtzpPpv7vOwAio-EF0U2gf06tz6IsTK171ZzzEEozyYPge1_Cmcs6iZWepzQD88PfBqRNAbD72O2HCuENrgOrPfV2pfvTOOXbPcVku8kUuXD/s400/Picture+004.jpg" style="cursor: pointer; height: 142px; width: 400px;" /></a></div>
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The wire on the left leads to the bottom brush. The right side attaches to the grounding leads on the other components. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjx8vIDJ4l8fEqgrgyZOPIWjrp3_Qw1fs9hQfT41Wop0k9N86VuH3Jt8MZMl5KRgZwCQT1DYN27mP3oUpgburEfg1YZsjbw6JI7DIatVlqJhqnwevQ2V_xmTkRnwcpiqu9W0hb4sS27xjdt/s1600-h/motor.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429771499615172514" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjx8vIDJ4l8fEqgrgyZOPIWjrp3_Qw1fs9hQfT41Wop0k9N86VuH3Jt8MZMl5KRgZwCQT1DYN27mP3oUpgburEfg1YZsjbw6JI7DIatVlqJhqnwevQ2V_xmTkRnwcpiqu9W0hb4sS27xjdt/s400/motor.jpg" style="cursor: pointer; height: 294px; width: 400px;" /></a></div>
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The aluminum plate keeps he motor in place, acts as a heat-sink, and is conductive for grounding.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDJjmGznuLbskWK36Ad5BpOUNRin0fd4_pd1wkQZjZxJrL9O08sw8aa52LHbQEZnKXSh0z0YM7HX_7UM2OCtXpQ2iouIjRElnvHF85igFXj9N2noCkQui5ZnhvJ_hgPUjeFYMZ81E2_nQE/s1600-h/motor_belt_pulley.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429766539786495298" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDJjmGznuLbskWK36Ad5BpOUNRin0fd4_pd1wkQZjZxJrL9O08sw8aa52LHbQEZnKXSh0z0YM7HX_7UM2OCtXpQ2iouIjRElnvHF85igFXj9N2noCkQui5ZnhvJ_hgPUjeFYMZ81E2_nQE/s400/motor_belt_pulley.jpg" style="cursor: pointer; height: 215px; width: 350px;" /></a></div>
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I attached the drive-belt-pulley with mighty putty.<br />
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<span class="Apple-style-span" style="font-size: x-large;">Accessories:</span><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglgCOvlHFNfUggexOMjzNrYrUkjaWfl60Fv7HCKEXxIj3Qeyxlwjw6ieVdB5SvKTRQZjPe4Md529l2M6Z15OyWUx2xw2cc6XavD6-h8iGAlUnHZXU396LAhAre2zVY0lVlRuu6OFdqkhN-/s1600-h/electrode.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429665721330569362" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglgCOvlHFNfUggexOMjzNrYrUkjaWfl60Fv7HCKEXxIj3Qeyxlwjw6ieVdB5SvKTRQZjPe4Md529l2M6Z15OyWUx2xw2cc6XavD6-h8iGAlUnHZXU396LAhAre2zVY0lVlRuu6OFdqkhN-/s320/electrode.jpg" style="cursor: hand; float: left; height: 136px; margin: 0px 10px 10px 0px; width: 320px;" /></a>You can use smaller serving bowls to make an electrode. drill a hole for a conductive handle, and attach handle to grounding wire.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixR3wbmQPl9tcZ1OeP0pEgxLJAn1TLytmRXynSnATFGmmfTPIrYx5KQWlHm34J2I277ICP1ag0N5R5P0UZCAVJbG-FnY66yq3N96vPWqh7GQDAkVPGWe67xqVcMHlfWRDfYQrxN0btgUlO/s1600-h/leyden_jar.jpg" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5429766532815983778" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixR3wbmQPl9tcZ1OeP0pEgxLJAn1TLytmRXynSnATFGmmfTPIrYx5KQWlHm34J2I277ICP1ag0N5R5P0UZCAVJbG-FnY66yq3N96vPWqh7GQDAkVPGWe67xqVcMHlfWRDfYQrxN0btgUlO/s400/leyden_jar.jpg" style="cursor: pointer; height: 196px; width: 400px;" /></a><br />
With some aluminum tape and a jar, you have a Leyden jar. This will make the sparks 50% more painful.<br />
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Well, once you are finished, show it to your friends after they have had a couple, and they will be more likely to volunteer for shock therapy.<br />
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Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-67495338294726050152009-11-05T20:39:00.000-08:002009-11-05T21:18:19.337-08:00Server cooling fan becomes ugly lawn ornament<img id="BLOGGER_PHOTO_ID_5400847846730182434" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 320px; CURSOR: hand; HEIGHT: 240px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxx2ggfy3rz_xrrBdnTGon6iqoKq2oTjZdJOYzWDvjJRB6unidHfRxYBUGG_2NYQ31h_hdEvGfh2bj160yeQsj-AFKgWmljx9-ECXg6uPG5UWXXA-ccDk1oYsPaey3-p0CCTqnDcSrVFwJ/s320/IMG_2784.JPG" border="0" /> So, you may think that I have too much <span class="blsp-spelling-corrected" id="SPELLING_ERROR_0">free time</span>, but the thing is, I like to tinker.<br /><br /><div>Here is a server fan turned ugly lawn ornament that will blink 2 red <span class="blsp-spelling-error" id="SPELLING_ERROR_1">LED's</span> when the wind blows faster than 5 mph (estimated).</div><br /><br /><p>If you happen to have one of these cooling fans (which you probably do, if you have as much outdated technology as I do), take it out of the computer case, and remove the plastic around the circuit board (wear goggles, plastic pieces will go flying everywhere). If you have outdated technology that may still be useable, consider donating it to <a href="http://www.freegeek.org/">this charity </a>for re-use.</p><br /><p>On the circuit board, you will see 3 gobs of solder that are a little bigger than the other gobs. use a knife to cut into the circuit board around these gobs, to prevent the electricity from leaking to other components on the board.</p><p>solder a wire to each one. (come to think of it, solder first and then cut. then you don't have to worry about your pathetic messy soldering job messing things up.) Attach 2 <span class="blsp-spelling-error" id="SPELLING_ERROR_2">led's</span> to each pair combination of wires, and determine which pair gets the most blink. with 3 wires, this will be 3 combinations. (n^2 + n)/2 = 6, but /2 since <span class="blsp-spelling-error" id="SPELLING_ERROR_3">ba</span>=ab. maybe you use 4 <span class="blsp-spelling-error" id="SPELLING_ERROR_4">led's</span> and all 3 wires?</p><p>Next, get a 2-liter plastic bottle and a glue-gun. Cut out the smooth mid-section of the bottle. Divide the width of this (the circumference of the bottle) by 7 (the number of blades on the fan). Cut the curved plastic into 7 equal rectangular strips. Next, figure the shape of the blade as something similar to what is pictured below. The reason the blade must be <span class="blsp-spelling-error" id="SPELLING_ERROR_5">thinner</span> at the edge has to do with the pitch angle. The angle of attack from the point of view of the wind must be the same for the whole blade. This varies as a function of (distance from center) * Pi * (rotational interval) There is an interesting video <a href="http://www.youtube.com/watch?v=BawUfbDDvtA">about how to make one out of <span class="blsp-spelling-error" id="SPELLING_ERROR_6">pvc</span></a>.</p><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1ip6JMvOANlAPLQXonRowJmUrl4bThgw5bpURfa_hkeOsnEgUUrcE39qH6TEOpeScAIUdg3dPAp4BwsrlXNTW4en1-Csw_uyUS13wkOfzEw__a7pv0A9fFIRNru_jRzIM39UO3cXPrs8_/s1600-h/IMG_2785.JPG"><img id="BLOGGER_PHOTO_ID_5400849306754360850" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 320px; CURSOR: hand; HEIGHT: 84px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1ip6JMvOANlAPLQXonRowJmUrl4bThgw5bpURfa_hkeOsnEgUUrcE39qH6TEOpeScAIUdg3dPAp4BwsrlXNTW4en1-Csw_uyUS13wkOfzEw__a7pv0A9fFIRNru_jRzIM39UO3cXPrs8_/s320/IMG_2785.JPG" border="0" /></a><br /><p>Use the glue gun to adhere the blades to the fan. make sure the straight edge is <span class="blsp-spelling-corrected" id="SPELLING_ERROR_7">perpendicular</span> to the tangent of the center circle (i.e. the blades are pointing straight out)</p><p>Glue-gun a stick to the back circuit board, and <span class="blsp-spelling-corrected" id="SPELLING_ERROR_8">walla</span>! a lawn ornament that is guaranteed to <span class="blsp-spelling-corrected" id="SPELLING_ERROR_9">embarrass</span> whoever you live with.</p><p></p>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0tag:blogger.com,1999:blog-8573446332082082334.post-79486410815385224982009-11-05T19:30:00.000-08:002009-11-05T20:37:53.851-08:00DIY windbelt with Wood and Duct Tape!<div><div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCU351xEpT5H7zpB4l0qCoy1t7B2Yv9yOufxOo-pIsf9MADcat-w7_yKBih_iceW9jTQTwVhJwi5IoBGePytsoqf0yB_axPqacT7WIm8FfHeV-XwnRc5ma1g1XHAT0iQW3SxfeLQK8w_Vi/s1600-h/IMG_2773.JPG"></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqrFkwxRntb5GaecEyF1GzFbsugScQYeeVCJRKSX7X9C3ffmA9ZD7TGuiDLVouMIZOn_l1OtNb1LfgjZ5XZ145D59ali3ObzL_MUbDpa4ps4MybpDWAcJ_BRza7Ix-Gml_cdJhOZizAFJ4/s1600-h/IMG_2777.JPG"><img id="BLOGGER_PHOTO_ID_5400831257862290274" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 320px; CURSOR: hand; HEIGHT: 240px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqrFkwxRntb5GaecEyF1GzFbsugScQYeeVCJRKSX7X9C3ffmA9ZD7TGuiDLVouMIZOn_l1OtNb1LfgjZ5XZ145D59ali3ObzL_MUbDpa4ps4MybpDWAcJ_BRza7Ix-Gml_cdJhOZizAFJ4/s320/IMG_2777.JPG" border="0" /></a></div><br /><div>If you have not heard of the wind belt, <a href="http://www.popularmechanics.com/technology/industry/4224763.html">read about it here</a>.<br /></div><div><br /><div>I wanted to make one of my own, so I set out to build one on my own out of wood, duct tape, copper wire , magnets, and carriage bolts.<br /></div><div>This first image shows the first material I tried - duct tape (aka duck tape, gun tape, handyman secret weapon)<br /></div><div>I could not find a store that carried the Mylar-coated-taffeta that the video recommends, so I had to resort to trying a plethora of other materials. (to name a few: polystyrene ribbon, packaging tape, latex, scotch "extreme" tape)<br /></div><br /><div>I found that the material has to have the right balance between elasticity, density, and plasticity to be a candidate for this device. The latex fluttered a great deal, but the range of motion was too high. The extreme tape did not have enough motion. The duct tape worked well, but the material I finally settled on: <a href="http://www.radioshack.com/product/index.jsp?productId=3295951&CAWELAID=235037175">gorilla tape</a> in the 1" roll. I had to put two pieces together with the sticky sides facing each other. (I still plan on trying out the taffeta, once I find it...)<br /></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglnRRde1QaAwKi-0fpv-YQVL5U7BpH9_XXfZZ3pagHe7wy1L_3EQtJuBEpOs_SJXUoFt5QwP19xLVwlo16bKJAkuURFX_KnI-MNRaqouI36dZs4oKcPewMofTlCjy9lREQUzJN8PoqZ6DS/s1600-h/IMG_2780.JPG"><img id="BLOGGER_PHOTO_ID_5400834410095811058" style="FLOAT: left; MARGIN: 0px 10px 10px 0px; WIDTH: 320px; CURSOR: hand; HEIGHT: 202px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglnRRde1QaAwKi-0fpv-YQVL5U7BpH9_XXfZZ3pagHe7wy1L_3EQtJuBEpOs_SJXUoFt5QwP19xLVwlo16bKJAkuURFX_KnI-MNRaqouI36dZs4oKcPewMofTlCjy9lREQUzJN8PoqZ6DS/s320/IMG_2780.JPG" border="0" /></a> The support structure is about 5 feet long, 5 inches wide. There are 2 clamps to hold the tape. a clamp on 1 side has longer carriage bolts to adjust the tension. I found that one needs an even tension across the belt to get it to vibrate.<br /></div></div><div>There are many factors in this vibration system: the tension, the placement/mass of the magnets, the mass/length of the band, the length of the band, and the resonances of the support structure. I'm sure you could apply some <a href="http://www.school-for-champions.com/science/sound_string_equation.htm">string vibration equations </a>to calculate your ideal tension and length. I chose to spend hours in a windy basement with a wrench. Besides, I forget the name for this type of motion, but the 1 dimensional Helmholtz equations do not fully describe it. In addition to a propagation along the band, there is a side to side wobble, like the <a href="http://www.youtube.com/watch?v=HxTZ446tbzE">Tacoma Narrows bridge</a>.<br /></div><div>I already had the button magnets, which I got for another project <a href="http://www.kjmagnetics.com/">here</a>. I had to wind the coils myself. The wire - I got at Axeman for $20. You can also get it from guitar-part stores... like <a href="http://www.guitarpartsusa.com/item--Guitar-Pickup-Coil-Winding-Wire-42-Gauge--PROD414">here</a> .<br /></div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCU351xEpT5H7zpB4l0qCoy1t7B2Yv9yOufxOo-pIsf9MADcat-w7_yKBih_iceW9jTQTwVhJwi5IoBGePytsoqf0yB_axPqacT7WIm8FfHeV-XwnRc5ma1g1XHAT0iQW3SxfeLQK8w_Vi/s1600-h/IMG_2773.JPG"></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCU351xEpT5H7zpB4l0qCoy1t7B2Yv9yOufxOo-pIsf9MADcat-w7_yKBih_iceW9jTQTwVhJwi5IoBGePytsoqf0yB_axPqacT7WIm8FfHeV-XwnRc5ma1g1XHAT0iQW3SxfeLQK8w_Vi/s1600-h/IMG_2773.JPG"></a>Once you wind the coils, you need to solidify them - I soaked these in a bath of molten beeswax/paraffin for an hour or so. Once you get your coils solidified, you can solder on leads, and attach whatever led's / rectifiers you have in mind. I could not get enough voltage as of yet to power any low voltage inverters I had laying around, but once you figure the right circuitry you could most likely power a light, recharge a battery. Maybe a couple of these could run a wireless repeater? I have it hooked up to 4 LED's (2 for each coil). The reason: the electricity coming out of the coils is AC, alternating current. LED's only conduct electricity in one direction. If you attach 2 LED's in opposite orientations to a coil, together they will conduct both currents coming out of the coil (one for +, one for -)</div><div> </div><div>I don't have a use for this ... but it is kinda cool to have. If anything, it is entertainment for the neighbors when they see me running back and forth in my backyard in the middle of the night, holding this big wood thing with blinking lights.</div><br /><div>More pictures:<br /></div><br /><div>The top non-adjustable clamp:<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe2q1ykWpVPSvmIzXsmjGaBt-igW0zP2T9uTD9TUG6pp9FdxCm9ExI6dzc83-sbmXgNbm59YCAQ-QHoE6yCXSee6HePYqt83O0fMkQx16TotyNmcv3_vq7bnUVQmWBKfcQCGNfajzjamvr/s1600-h/IMG_2775.JPG"><img id="BLOGGER_PHOTO_ID_5400843454862482082" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 245px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe2q1ykWpVPSvmIzXsmjGaBt-igW0zP2T9uTD9TUG6pp9FdxCm9ExI6dzc83-sbmXgNbm59YCAQ-QHoE6yCXSee6HePYqt83O0fMkQx16TotyNmcv3_vq7bnUVQmWBKfcQCGNfajzjamvr/s320/IMG_2775.JPG" border="0" /></a><br /></div><br /><div><br />The "bridge", to adjust the length of the belt:<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQ8Ssew-lL6Yu8KajcVD9_895ftcwJs3qaDzA8wfzZuOPRMUuqcUNJBUMBbJz5JvCI_rXNyGfLX5Wr-FPghqQeAkUTtitOXxdvm78HQzMsnKSMRr4OihTbyvHSoXSg2SLPKVWGKmOTgPGr/s1600-h/IMG_2779.JPG"><img id="BLOGGER_PHOTO_ID_5400843737639005426" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 162px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQ8Ssew-lL6Yu8KajcVD9_895ftcwJs3qaDzA8wfzZuOPRMUuqcUNJBUMBbJz5JvCI_rXNyGfLX5Wr-FPghqQeAkUTtitOXxdvm78HQzMsnKSMRr4OihTbyvHSoXSg2SLPKVWGKmOTgPGr/s320/IMG_2779.JPG" border="0" /></a><br /></div><div>4 LED's in the lamp enclosure:<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXbFcrQ_gNs78t0CqEA2aQFqMbX8IhG-LB_OCvA1e-My7c6WW7myQInbaXVXEgeB3s2cMy36xi6f2FrwXQipcP4257rvIZtNt1tow5hjEm3-HEUyvmws0SUBCn3fih7lFegJKPIeCNONox/s1600-h/IMG_2781.JPG"><img id="BLOGGER_PHOTO_ID_5400844033276518834" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 229px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXbFcrQ_gNs78t0CqEA2aQFqMbX8IhG-LB_OCvA1e-My7c6WW7myQInbaXVXEgeB3s2cMy36xi6f2FrwXQipcP4257rvIZtNt1tow5hjEm3-HEUyvmws0SUBCn3fih7lFegJKPIeCNONox/s320/IMG_2781.JPG" border="0" /></a><br /></div><div><br /></div><br /><div><br /><br /><br /></div><br /><div></div><br /><div><br /><br /><br /></div><br /><div><br /></div><br /><div><br /><br /><br /></div><br /><div></div></div></div>Johnnyreubhttp://www.blogger.com/profile/03096501207629319807noreply@blogger.com0