This non-inverting AC amplifier was found on a Popular Electronics. The setting applies to any operational amplifier.
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...