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 is from a cookbook to timers. The circuit is triggered by an external signal and,...
This is a general purpose pramplifier launched in Brazil by Philips in the years 70. The BC549 is...
This circuit turns on your car's backlight when a vehicle coming from behind gets too close to it...