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.
September 2017 - Mouser Electronics already has the AP431S adjustable regulator from Diodes...
This circuit is from the 80's, making use of components of the time. What the circuit does is...
Using a PLL this circuit can generate signals of up to 500 kHz which is basically determined by the...