Quote:
Originally Posted by omar
I have improved the drawing a little and got rid of the connections. You may need to shield the sensing stage. It appears that the transmitting coil and the receiving coil are capacitively coupled to operate at one frequency, and thus this process increases the sensitivity to the resonant frequency. You may need to raise the value of the variable resistance to facilitate the adjustment process. Anyway, as you know, nothing is guaranteed in this field .
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Hi Omar
please upload PCB sprint file .