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.
This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V...
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
Found in a 1960s documentation, this circuit uses a transistor to drive a relay as well as a set...