It can be a simple pen shaped piece of testing hardware that indicates the existence of electricity or an advanced tool that detects precise voltage levels in electrical systems.
Voltage level detector.
Now as the potentiometer is swiped across its range a count can be observed represented by the four led s.
To see if the circuit is working or not use a potentiometer connect its two ends to the two poles of the battery connect the wiper to the first stage of the circuit.
Voltagewatch sensors identify undervoltage or overvoltage concerns and help protect critical motors and electronics.
A voltage detector is a device that determines the presence or absence of an electrical charge in an object.
Voltage level detector circuit simulation response.