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.
Three of the four gates found in a 4001 can be used to perform as an AND gate. This improvisation...
This VFO was found in a 1980s documentation. The central frequency is given by the crystal and the...
This 80's amplifier delivers 6 W of 8 ohm speaker power without using an output transformer....