This programmable sound circuit was found in the July 1978 issue of Radio Electronics magazine. It uses an integrated circuit of the time dedicated to producing effects.
This immobilizer circuit for the car was found in the Radio Electronics magazine of December 1976....
This circuit allows the activation of a remote telephone bell made with a common piezoelectric capsule. The...
This circuit can act as a receiver for the transmitter of the previous circuit. We found it in...