Author Topic: N or AA battery/battery holder  (Read 4779 times)

Offline JesseHNTR

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on: February 19, 2008, 05:48:23 PM
Should I buy a AA or N battery holder, Is their an actual difference, and if I get a AA do I need a resistor?



Offline dice

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Reply #1 on: February 19, 2008, 07:41:46 PM
Only real differences between AA, AAA, or N is the physical size and how long it will provide power.

all of them are 1.5Volts which if you use the more common IR LEDs you will not need a resistor. If you use more than one you will need a resistor.

Hope this helps
Dice :)



Offline imarzouka

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Reply #2 on: April 02, 2008, 03:34:24 AM
You always need a resistor to limit the current. Even if the LED forward voltage is equal to your battery voltage. Use this calculator: http://ledcalculator.net it's very nice.