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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
@tage, thanks! that's really interesting - I had no idea about the PTC disc!
@DrAzzy I actually really wanted to make a board to do it, but I don't really have the time at the moment. I figured for 3/4 cells you could just use Opto-isolators for cell balancing.
@d0773d The MAX1555 has a charge status output - literally just on/off, but I think it charges at 100mA (or 500, depending on the setup) so you could get a rough idea of capacity by measuring the charge time.