Automatic TV power off (CB5945E)

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.

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6 Transistors MW Radio (CB16572E)
We found this transistorized AM receiver of the regenerative type of excellent quality in a...
Continuity Tester (CB4546E)
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...
MW trap for short wave receiver (CB20935E)
Found in American documentation from the 1980s, this circuit rejects strong MW stations that may...