How to make Contactless AC detector at home

Опубликовано: 02 Июль 2026
на канале: Project 4U
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This is a transistor(BC547) based contactless AC mains voltage detector circuit which can be used to detect presence of AC mains voltage without any electrical contact with the conductor carrying AC current/voltage. Thus it can be used to detect mains AC voltage without removing the insulation from the conductor.

Circuit Diagram:- https://drive.google.com/drive/folder...

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