3 ms·

I'm a big fan of joule thiefs. Small solar panel, a supercap and a joule thief and you can trickle charge NiNM batteries for years+. That's how I keep my hand-r

I'm a big fan of joule thiefs. Small solar panel, a supercap and a joule thief and you can trickle charge NiNM batteries for years+. That's how I keep my hand-radios fully charged when not in use.

lightedman 9y ago
Don't even need the supercap. Resistor as the inductor, HW012 IC, hook up a solar cell, LED, and battery. Boosts 1.2V to 3.6V. http://i.imgur.com/3y1PMoP.jpg http://i.imgur.com/3y1PMoP.jpg