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 1967 American documentation. The switching diode (tunnel) used is an...
This sonic control circuit for a small robot turtle was obtained in an American documentation from 1967....
This circuit triggers a load when the sensor detects humidity. The triggering point is adjusted by...