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.
Found in a 1980s documentation, this circuit detects when the voltage drops below 11 V. Other...
This is a commercial circuit from a Japanese publication from 1972. The circuit uses a FET that...
In this circuit we show how to modulate the pulses produced by a 555 in frequency. The circuit can be...