Circuit detects alternating current in remote wires, locates wires in walls, determines wire polarity, Detects wires to find internal breaks. The circuit does not need to touch the wires, so it is very safe. The circuit is very useful when you need to find the polarity of the wire when there is no electrical tester, find the location of the wire before drilling the wall to avoid electrical accidents that are often very dangerous. The circuit uses 3 npn S8050 transistors, 100Ω resistors, LEDs and sirens to warn of wire location. Depending on the environment and the strength of the current, the AC current detection circuit has different sensitivity. The circuit uses the principle of electromagnetic induction and coil then this signal is amplified by 3 darlington s8050 transistors. In the video, I explain the operating principle of the circuit that detects alternating current and the magnetic field of the AC conductor.
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