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Old 29th January 2006, 01:14 AM   #1
vinnie is offline vinnie  Norway
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Default Resistor spreadsheet?

Im about to make a wallin jig and have a box of resistors with 38 different values ranging from 2,37ohm up to 887k(5 of each), 0,25 watt types. in the jig I need 2w resistors, so I need to do some paralelling, but I have trouble finding what values to use.
does anyone know of a spreadsheet that could do this calculations?
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Old 29th January 2006, 01:33 AM   #2
poobah is offline poobah  United States
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I don't have a spreadsheet for that but here is the formula to derive standard (E96) resistor values:

10 ^ (X/96)

Where X = 0 to 96 for all the values from 1 to 10 ohms

X = 96 to 192 for all that values from 10 to 100 oms

so on and so forth.

This is for E96 Values for E24 values... well you can see...


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Old 29th January 2006, 01:38 AM   #3
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Texas Instruments has a freeware resistor calculator on their website.
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Old 29th January 2006, 05:59 AM   #4
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Guys, why don't you use Google?

http://www.google.com/search?&q=calc...istor+parallel

This was very neat.

http://www.computertorture.com/noncompliant/parallel/
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