Description of battery charger indicator:
The circuit above will make your simple battery charger look sophisticated. This circuit is a charging indicator for battery charger. Its used to check whether the battery is charging or not. Voltage comparator LM393 IC is the heart of this Battery charger indicator circuit.
D1 LED stays lit when there are at least 25 milli-amps of current which flows to the battery. This circuit is designed specifically for 12V battery with a load current of 1A. With a little modifying component values, load current and voltage can be changed.
Battery charger indicator parts list :
R1 : 1M
R2 : 2.2K
R3 : 1 ohm 0.5 W
R4 : 10K
R5 : 1K
D1 : 1N5819
D2 : Led