We found this circuit in an old documentation. Its purpose is to turn on warning lights when the vehicle in a garage touches or passes a sensing bar preventing it from hitting the wall.
Suggested by National Semiconductor in documentation from the 90s, this circuit uses a switched...
This capacitive switch or approximation relay was found in a 1980s US publication. Power should...
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...