This transistorized circuit is powered by a voltage of 6 to 12 V providing high voltage for a neon lamp. The circuit is from a 90's publication. Modern equivalent transistors can be used.
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...