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 is based on an uncommon Texas component today, as found in an American 1980s...
Maxim suggests this circuit in documentation from the 1990s. The components are from the period and...
We found this circuit in a Popular Electronics from 1992. The transistor is general purpose,...