Resistor charts or similar?

stephenanderson2 · Aug 23, 2003

Anyone know where I can get specs on which resistors to use for modifying incandescant lights to leds. Or changing the voltage from 4.5v to 4, or 3.5 volts on AA's? Maybe what to use for stepping up voltage from 2 AA's to 4 volts? Any help is appreciated. /ubbthreads/images/graemlins/buttrock.gif

Reboot · Aug 23, 2003

Specs for LED's will list voltage drop accross LED and operating current. Knowing those, all you need is to apply ohms law to come up with appropriate resistor value.

NightStorm · Aug 24, 2003

Vin - Vf(led)
------------- = R
ma(led)

Dan

stephenanderson2 · Aug 24, 2003

also where can i get tail caps with switches?

biblefreak · Aug 24, 2003

go to the sandwich shop (Dat2Zip) http://www.anlighten.com/shop/default.php?osCsid=7bc6442c8b676ad10fd3963cec1ffd20

ElektroLumens · Aug 24, 2003

I have an Excel spreadsheet, with the ohms formula plugged in it. You can enter the voltage, and current info, and it will tell you what resistance to use. If you want it, send me an email, and I'll attach it to an email and send it to you, free.

I researched the ohms law, and took the formula, and put it into the spreadsheet. I have all sorts of different settings I put in, just to see what resistor to use.

Wayne j

Resistor charts or similar?

stephenanderson2

Newly Enlightened

Reboot

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NightStorm

Flashlight Enthusiast

stephenanderson2

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biblefreak

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ElektroLumens

Flashlight Enthusiast

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