Is it okay to use two 3.7V AA battery to replace two 1.5V AA battery?
brighter LED?
Can use two 3.7V AA battery?
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Can use two 3.7V AA battery?
Two 3.7v cells is way too much voltage. You will burn out the LEDs if you don't fry the processor first.
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- Posts: 28
- Joined: Mon Dec 19, 2011 11:19 pm
Re: Can use two 3.7V AA battery?
what is the maximum voltage can take without getting the LEDs or processor fry?
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Can use two 3.7V AA battery?
The processor is 5.5v max. For the LEDs, you need to worry about current. The current going to the leds is controlled partly by the battery voltage and partly be the resistor arrays RN1-RN8. The LEDs are rated for 20mA each.
Details on driving LEDs are here: http://www.ladyada.net/learn/arduino/LEDs.html
Details on driving LEDs are here: http://www.ladyada.net/learn/arduino/LEDs.html
Please be positive and constructive with your questions and comments.