This circuit is from an old RCA documentation. The circuit sources a charging current of 1 A and is intended for the 6 V lead acid battery used in some cars of the era.
This simple photometer uses a 0-200 µA galvanometer as indicator. The sensor is a common LDR and...
This circuit is from the Motorola Linear Databook of 1990 and can be implemented with other...
This circuit triggers a warning oscillator if you forget the lights on when you leave the car. The...