https://aznot.com/index.php?action=history&feed=atom&title=Electronics%2FDIYElectronics/DIY - Revision history2026-05-06T20:39:31ZRevision history for this page on the wikiMediaWiki 1.41.0https://aznot.com/index.php?title=Electronics/DIY&diff=3518&oldid=prevKenneth: /* Ohms Law */2016-07-08T02:23:28Z<p><span dir="auto"><span class="autocomment">Ohms Law</span></span></p>
<p><b>New page</b></p><div>== DIY ==<br />
<br />
Electronics:<br />
<br />
See [[Electronics/DIY]]<br />
<br />
Home Automation:<br />
<br />
See [[Home Automation]]<br />
<br />
Hardware Hacks:<br />
<br />
See [[Hardware Hacks]]<br />
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<br />
==Ohms Law==<br />
*[http://www.allaboutcircuits.com/vol_1/index.html All About Circuits] (see ch 5) (GOOD RESOURCE!)<br />
*[http://www.tpub.com/neets/book1/chapter3/1-29.htm Rules for Parallel DC Circuits]<br />
*[http://www.tpub.com/neets/book1/chapter1/index.htm Matter, Energy, and Electricity] (see ch 3)<br />
*[http://en.wikipedia.org/wiki/Ohm's_law Wiki: Ohm's law]<br />
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http://upload.wikimedia.org/math/a/3/d/a3ddbc2ec4f5974fb9d5b7ed9523c93e.png<br />
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==Test Circuit==<br />
[http://www.phy.hk/wiki/englishhtm/Circuit.htm Java Applet: Electric Test Circuit]<br />
<br />
==VA vs Watts==<br />
[http://www.powervar.com/Eng/ABCs/CalcVAWATTS.asp Calculating VA and Watts]<br />
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==Electronic Stores==<br />
*Radio Shack<br />
*[http://www.utahelectronics.com/ Central Utah Electronics]<br />
*:735 South State St., Provo, UT 84606<br />
<br />
<br />
Your best bet is probably the mail order houses:<br />
<br />
*DigiKey - www.digikey.com<br />
*Mouser - www.mouser.com<br />
*Jameco - www.jameco.com<br />
*Allied - www.alliedelec.com<br />
*Antique Electronic Supply - www.tubesandmore.com<br />
*Radio Daze - www.radiodaze.com<br />
<br />
The latter two are especially good if you enjoy vintage vacuum tube electronics or guitar amplifiers.<br />
<br />
Electronic components are easier than ever to obtain; You just can't get them from the corner Radio Shack any longer.<br />
<br />
Some of these companies have a $25 minimum order, though that is really not a deterrent.<br />
<br />
==Power Management Console==<br />
[http://www.netadmintools.com/art41.html Power Management Console]<br />
<br />
[http://www.netadmintools.com/art423.html Writing a Bash For Loop] (Turn relays on)<br />
<br />
To turn all relays on (power management console connected through serial):<br />
[usr-1@srv-1 ~]$ cat allon<br />
#!/bin/bash<br />
for ((i=100;i<=115;i+=1)); do<br />
echo $i<br />
sleep 1<br />
echo $i > /dev/ttyS1<br />
done<br />
<br />
== USB Relay Controller ==<br />
<br />
[http://www.ecrater.com/product.php?pid=4757843 USB Relay Controller - One Channel]:<br />
<br />
A general purpose USB Relay controller for connection to a PC's USB port using VCP (Virtual COM port). Control devices using your PC.<br />
<br />
Features:<br />
• Fully assembled and tested.<br />
• For 12V/24V DC 15A or 120V/220V AC at 10A max.<br />
<br />
Complete including:<br />
- One USB relay Controller<br />
<br />
Dimensions (PCB board) :<br />
90 mm / 35 mm<br />
<br />
Links:<br />
Manual - http://www.sigma-shop.com/manuals/USB1RELAY_manual.pdf<br />
Drivers - http://www.ftdichip.com/Drivers/VCP.htm<br />
Support forum - http://www.sigma-shop.com/board/<br />
<br />
Drivers are available to work with the following operating systems :<br />
Windows Vista x64, Windows XP x64, Windows Server 2003 x64, Windows Vista,<br />
Windows XP, Windows Server 2003, Windows 2000, Windows ME, Windows 98,<br />
Linux, Mac OS X, Mac OS 9, Mac OS 8, Windows CE.NET (Version 4.2 and greater)<br />
<br />
Price $24.95 including worldwide shipping.<br />
<br />
== Magnetic Card Readers ==<br />
<br />
[http://www.sparkfun.com/commerce/product_info.php?products_id=8633 SparkFun Electronics - Magnetic Card Reader] ($59.99)<br />
:"Description: This is a simple three track magnetic card reader with serial output. This reader takes power from the serial port and outputs a 9600bps 8N1 ASCII serial stream. Plug the reader into a serial port (or USB to serial converter), swipe your frequent shopper card, and you'll see the account number plain and unencrypted on the screen. We couldn't find a card the reader couldn't read. No drivers needed. No software needed. Just pure, wonderful serial."<br />
<br />
<br />
[http://www.sparkfun.com/commerce/product_info.php?products_id=8634 SparkFun Electronics - Magnetic Card Reader/Writer]: ($139.95)<br />
:"Description: This is a heavy duty, low coercitivity, three track magnetic card writer and reader. This unit takes power from an available PS2 port (includes a pass through connector so you can still use a mouse or keyboard) and passes information through the RS232 serial port.<br />
<br />
:Please note: This writer works with low coercitivity cards only."<br />
<br />
== Controlling a 120 AC Circuit ==<br />
<br />
ac - Can you put a 120vac positive line into a breadboard? - Electrical Engineering Stack Exchange - http://electronics.stackexchange.com/questions/19813/can-you-put-a-120vac-positive-line-into-a-breadboard<br />
<br />
==Projects==<br />
===LED Throwies===<br />
*[http://www.instructables.com/id/LED-Throwies/?ALLSTEPS#allstepslogin LED Throwies Instructables]<br />
*[http://graffitiresearchlab.com/?page_id=6 LED Throwies]<br />
*[http://www.hebeiltd.com.cn/?p=throwies Throwies packs]<br />
*[http://www.buy-leds-online.com/throwies.html Buy LEDs OnLine] (Good place to buy small quantities)<br />
*[http://www.cheapbatteries.com/coin.htm Cheap Batteries]<br />
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== keywords ==<br />
<br />
[[Category:Electronics]]<br />
[[Category:Robotics]]</div>Kenneth