This circuit was found in the Electronics Experimenter Handbook from 1991. The circuit controls a simple relay for the purpose of turning circuits on or off or switching audio channels.
This is a circuit with a period component that consisted of a voltage reference. The circuit is...
The critical components of this 1978 circuit are transformers, which, hopefully, can be obtained from...
We found this circuit in the March 1991 issue of Radio Electronics magazine. The integrated...