Hello my friends he made this copy please help
First, the device works, but the distance is 20 cm on the coin, secondly, there is a lot of noise and confusion, and my question is how to adjust the resistors. The 20 kg
First, the device works, but the distance is 20 cm on the coin, secondly, there is a lot of noise and confusion, and my question is how to adjust the resistors. The 20 kg

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