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 circuit was found in a Hands On Electronics with the suggested application an optical link for...
This circuit is from an Electronics World of 1967. The circuit slows down the activation of a...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...