How can I make a solar charger for extended battery/capacitor life? Answered
I want to build a solar charger that could keep a rechargeable, say, CR2032 battery always trickle charged without damaging anything. I want to make this circuit as simple as possible.
I want to just hook up a solar panel, with an operating voltage of 3V that delivers 1mA, to a rechargeable CR2032 that was in-use. Assuming the solar cell was delivering power for 12 hours in the day, would what could go wrong? I'm sure there could be some danger, but I don't know enough.
Do I need a charge regulator? Can I charge the cell and also consume power from it? If it's forgotten about for a year, will the battery explode?
Can this be done with a capacitor? Can I keep trickle charging a capacitor that is attached to say a heat sensor which uses very little power?