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.
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...
This circuit was found in Electronics Handbook, Vol XIII 1993 and consists of a simple direction...
This car alarm was found in an American '80s documentation. The circuit automatically activates...