This circuit for analog TV was found in a 90s EDN. The integrated circuits used are from that time and may present some difficulty in obtaining.
The purpose of this circuit is to automatically turn a water pump on and off. Sensor 1 is the...
This NOR or NO-OR function circuit can be implemented with two or more general purpose...
This circuit has an interface for a multimeter or electronic voltmeter. We found it in a 90s...