What does a logic probe indicate?

A logic probe is a specialized tool used in electronics to diagnose the state of digital signals in circuits. Its primary function is to indicate whether a signal is at a high voltage (logic high) or low voltage (logic low) condition, which corresponds to the binary states used in digital electronics.

When a logic probe is connected to a circuit, it can detect the voltage level at a specific point. For digital circuits, a high voltage generally represents a logical "1" or "true," while a low voltage indicates a logical "0" or "false." The tool may provide visual or audible feedback to the technician, making it easy to assess the state of the logic levels in the circuit being tested.

This capability is essential for troubleshooting and verifying the operation of digital components, such as integrated circuits, flip-flops, and microcontrollers. In contrast, other options like resistor values, capacitance levels, and current flow pertain to different types of measurements and tools, such as multimeters or oscilloscopes, which are used for different diagnostic purposes in electronic circuits.