This circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit includes a powerful pulsating siren. It is activated by courtesy light switches and other sensors.
This circuit is from a Japanese magazine of 1973. The circuit is designed to withdraw the power...
This is an interesting sound effects circuit that uses only discrete components. Components are common...
This circuit causes a green LED to light up when we step on the brakes and the rear lamps to light...