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Small power source
I was planning to make LED jewelery, but would need a very small power source.
In the best case it could be powered by the body's movement.
Is there anything small enough to bit on a wrist, yet can power about 10 LEDs?
Discussions
9 years ago
I would use a car battery
Just kidding unless you are trying to kill yourself
Probably a watch battery and there are some amazingly thin & small ones
Reply 6 years ago
car battery=12v . He will do not kill himself, in any case. When you don't know, don't speak.
9 years ago
Yes, these things:
www.instructables.com/community/Cheap-Lithium-ion-batteries-help/
40x35x6 mm, 760mAh 3.7V
L
9 years ago
you could use a charging system like in "Shake it like a Tic-Tac"
although, there is some debate in the comments about how to wind the coil, how much to wind, etc.
9 years ago
yes, and no, if you mean super small, you could light 10 led's for up to 10 seconds, if you mean liek watch battery size, then ya a cfew hours of use.
9 years ago
Something like this would be great: www.gizmag.com/micro-generator-produces-ac-power-from-movement/10390/