Up to now, this battery level indicator design was limited to 12 & 24V applications. In past circuits, the use of fixed resistors ... For convenience, I estimated the charge level thresholds of a 4.5V ...

The charger’s electronics consist of a small 5-V/500-mA solar panel (SP1) linked to a Li-ion battery charger circuit built ... by a high level on the set or reset line, respectively. You can see the ...

There’s a circuit right out of the textbooks ... found himself in with this custom LED battery level indicator. As the video below unfolds we learn that he didn’t start exactly from scratch ...