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 was found in the May 1959 Radio Electronics magazine. Its purpose is to provide bias...
The integrated circuit used in this project is not common today, but it can be implemented with more...
This circuit uses a sensitive vibrator that can be made with a reed-switch to activate a relay from...