Flashlight Battery Blue
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Why is my flashlight burning out?
I made a flashlight with 3 bright blue LEDs and added a 22Ohm resistor to each one of them, all connected to a 3.7V battery, and always one of the LEDs burnes out. Anyone know why?
I don't know what LEDs you are using but from this website:
http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fspecs%2Fb4630_specs.htm
all of their blue LEDs run at 20 mA
Assuming this,
I=E/R
3.7/22= 168 mA
You are burning up your LEDs
3.7/200=18.5 mA
Try changing your resistor to 180 - 200 Ohms.
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