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Wiimote Project » Forum » Hardware Support » IR Pens » N or AA battery/battery holder
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Author Topic: N or AA battery/battery holder  (Read 1057 times)
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JesseHNTR
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« on: February 19, 2008, 06:48:23 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?
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dice
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« Reply #1 on: February 19, 2008, 08:41:46 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 Smiley
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imarzouka
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« Reply #2 on: April 02, 2008, 04:34:24 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.
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