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.
The previous circuit (CB5050E) triggers when the temperature exceeds the limit set on the...
The circuit presented is based on a mechanical tuning fork. The circuit is suggested by National...
This circuit for electronic voltmeter was found in a publication by Gernsback from 1960. The...