Device for checking electrical continuity

摘要

The device has a resistor (R) in series with the conductor to be checked. The presence of an intermittent circuit resistance change produces a change, e.g. U in the resistor voltage (U2) which is amplified by an acoustic amplifier (V1), to generate an audible signal. Visual indication may be provided by LEDs in a second amplifier (ST) circuit, where a red LED (D1) indicates a faulty circuit and a green LED (D2) a healthy circuit