This circuit is based on a Siemens S566B integrated circuit. The circuit is from a Radio Electronics Experimenter and also has a digital control input.
We found this circuit in an American documentation from 1977. The circuit must not be powered by a...
This circuit uses two Raytheon RC4558 operational amplifiers that are similar to the 741. The...
This light-sensing probe was found in a 90s Popular Electronics. The circuit detects light sources by...