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Fly Electric DIY PIC balancer
#1
This isn't mine, but posting in case it is of use to someone (and to help me find it later).

Up to 7 cells with monitoring and switching of a load resistor with indicator leds. Can adjust the balance discharge current by changing the load resistors.

http://www.flyelectric.ukgateway.net/pic-balancer.htm
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#2
Thanks I hadn't see this one before.
The use of diodes to drop the voltage so it doesn't need to use opamps to measure cell voltages is a neat idea.

Could also use a PICAXE instead of the PIC, as the former is the same device only with a preloaded easier to write for language.
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