What voltage is required across the exposed rear charging pads?
Hello,
The back of the calculator has two metal pads that I've seen used in charging stands for 10+ calculators in classrooms. I'd love to make my own and I was wondering if anyone had done any research on how this system works.
Does it work as a LiPo charger where it needs to shut itself off when the battery is above a certain voltage, or is the charge controller embedded in the calculator? Also, more pertaining to the title, does it draw the same 5V that it gets through the USB port or is it something closer to 6V (I saw a TI forum post indicating that the nominal battery voltage was roughly 6V but I haven't actually looked at the battery myself).
Thanks!
Ist dies eine gute Frage?
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If you have one of the charging stands try using a multimeter to check that :). I can’t check my calculator right now but I might be able mess around with it later and post my results
von Josh Yacktman