4 in 1 circuit remote control switch | Automatic light on-off | fire alarm and more

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In this video, I m going to Make 4 IN 1 circuit using BC547 transistor | remote control switch | Automatic light on-off | infrared line security system | fire alarm

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Видео 4 in 1 circuit remote control switch | Automatic light on-off | fire alarm and more канала RJ Imagination