In most standard TTL (Transistor-Transistor Logic) circuits, a "High" state is typically represented by a voltage above 2.0V. When the probe tip touches a point with this voltage, a red LED usually lights up. This tells you the component is receiving or sending a "True" signal. 2. Detecting Logic LOW (0)
Logic probes are widely used in various fields, including: logic probe function
The logic probe function is simple but powerful: it provides a real-time window into the "thinking" process of a digital circuit. It is the bridge between knowing a circuit has power and knowing that it is actually working. logic probe function