A Logic Probe -

A logic probe is a handheld device that indicates the logic state of a digital signal. It typically consists of a probe tip, a display, and a power source. The probe tip is used to touch the circuit or wire being tested, and the display shows the logic state of the signal, usually as a high (1) or low (0).

A logic probe works by comparing the voltage level of the signal being tested to a reference voltage. In digital circuits, logic states are represented by two voltage levels: high (usually 3.3V or 5V) and low (usually 0V). The logic probe uses a voltage comparator circuit to determine whether the signal being tested is high or low. a logic probe

When the probe tip is touched to a circuit or wire, the voltage level of the signal is applied to the comparator circuit. The comparator circuit then compares this voltage level to the reference voltage and determines the logic state of the signal. The result is displayed on the probe’s display, usually as a high (1) or low (0). A logic probe is a handheld device that