Suggested by General Electric documentation from 1968, this circuit activates a relay after 60 seconds, keeping it closed. PUT is an uncommon component today.
This fish flame circuit was found in a 1971 magazine. The circuit can still be mounted with BC558...
This circuit was found in a Radio Electronics from June 1967. The regulator is suitable for power...
This medium wave radio must use a high impedance piezoelectric, crystal or magnetic phone and the...