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.
TR1 must be mounted on a heatsink in this circuit. Voltage output is 8.6 V but this value can be...
This circuit measures the power of a transmitter being sandwiched between the antenna output and the...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...