(Repeat post as image failed to load.)
I have a small solar panel for maintaining my 12V car battery. (Circuit below.)
The panel supplies about 75mA to the battery in full sunlight.
I want to avoid wasting power, so LED1 and LED2 will take only about 2mA each.
LED1 shows the panel is producing volts, but I want a circuit that will light LED2 only when the panel is charging the battery.
I’m trying to find a way, when current is flowing, to use the voltage across DI to turn on TR1.
How can I light charging indicator LED2 without significantly reducing the voltage or current going to the battery ?
Please modify the circuit freely to accomplish this.
Many thanks for any help you can give.
I have a small solar panel for maintaining my 12V car battery. (Circuit below.)
The panel supplies about 75mA to the battery in full sunlight.
I want to avoid wasting power, so LED1 and LED2 will take only about 2mA each.
LED1 shows the panel is producing volts, but I want a circuit that will light LED2 only when the panel is charging the battery.
I’m trying to find a way, when current is flowing, to use the voltage across DI to turn on TR1.
How can I light charging indicator LED2 without significantly reducing the voltage or current going to the battery ?
Please modify the circuit freely to accomplish this.
Many thanks for any help you can give.
