This 80's circuit turns off a TV or other appliance after a set time. The base is a 555 IC and the relay is according the supply.
We found this circuit in the July 1988 Radio Electronics magazine. The frequencies are given by...
This circuit can flash for up to 30 months using alkaline batteries as shown in the table next to the...
This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with...