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WTB Test Load

djnx

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Sep 8, 2008
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I am looking to buy a test load from someone or somewhere that has it in stock. It would need to work with bluray and Red Diodes

Thanks
Doc
 





Joined
Aug 26, 2008
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Just go to radio shack and get 3 or 4 N14001 diodes and a 1 ohm 1 watt resistor. Solder them all together and place your probes on either side of the resistor. 1mA = 1 mW :) Do a search and you'll find a diagram.
 

artix

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May 24, 2008
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Where do I get a 1 ohm resistor? And 6 diodes from the same website?

(The source (Canadian radioshack) sells 2 diodes for $4! And they don't sell 1 ohm resistors.)
 
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Jan 7, 2007
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I use one or two of those Cree style lights removed from host flashlights.
Adjust the voltage as needed with a 1N400x diode.

Mike
 
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Feb 9, 2008
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Yeah I got my IN4001 resistors from radio shack, theyre cheap. And RS also has 1ohm resistors.
 

rkcstr

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Dec 1, 2007
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No, I'm not selling anything right now... I don't really have the time to build and mail out things until after my exams.  I'll probably resume on Nov 24th.

This is the only resistor I found on RS's website which is 1 ohm, though a bit overkill at 10W.  It's also 10% tolerance, which means your measurements may be off by 10%, which at 100mA, could be as much as +/-10mA, if you assume its value is 1 ohm.  If you measure the actual resistance (though most multimeters are not very accurate at low ohms), you can more accurately calculate, but it really may not be necessary for your needs.  I typically use 5% tolerance (higher precision high wattage resistors get pricey), but most I've seen are pretty consistent in their resistance anyway.

http://www.radioshack.com/product/index.jsp?productId=2062290

Here's the diodes, a 25 pack of various 1N00x-series.  You can mix-match for the most part, the different numbers are for their maximum rectified voltage rating (no significant changes in their forward voltage drop).

http://www.radioshack.com/product/index.jsp?productId=2062589

I'm not sure if RS Canada also offers these items, or not, though Artix.
 




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