Build your own metal detector with an arduino Circuit detector gold soil metal ground deep scanner circuits homemade under fig2 power resistances across between probes bridge electrodes amplifier Under soil gold detector circuit
Build Your Own Metal Detector with an Arduino - LEKULE
Long range gold detector circuit diagram
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![Under Soil Gold Detector Circuit](https://i2.wp.com/makingcircuits.com/wp-content/uploads/2016/08/Fig2.png)