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Help Calculate Battery Size For LED Illumination
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Help Calculate Battery Size For LED Illumination

by AMBRO on Thu Feb 14, 2019 11:57 am

I have an LED and the power specs on it are 3 Volts and 20mA. I'm trying to figure out if I can power it with a coin cell battery, in particular the common 2032 coin cell. The specs on that battery are 3 volts BUT 240mA. So will the excess 220mA blow out my LED ?

AMBRO
 
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Re: Help Calculate Battery Size For LED Illumination

by adafruit_support_bill on Thu Feb 14, 2019 12:10 pm

Short answer: That will work.
For the full analysis - see this interesting post over at Evil Mad Scientist: https://www.evilmadscientist.com/2009/s ... -throwies/

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Please be positive and constructive with your questions and comments.