This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a carrier. The used components are not common today.
This indicator circuit used and game machines (arcades) to indicate that the machine is being...
This circuit fires at the touch of a sensor, passing its output from high to low in a time given by...
This circuit is from an English magazine from 1978. The circuit can be assembled with BC557, BC547...