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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Precision Switch Oscillator (CB4171E)
This circuit makes use of a PLL 567 and the components must be calculated according to the desired...
Receiver for remote control via powergrid (CB9577E)
The transmitter can be that of CB9574E. This receiver uses a PLL to directly trigger a sensitive relay....
Negative Feedback Stage (CB6131E)
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...