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Greetings friends I'm from Brazil, I'm using google translator, I have a detector and was wondering if pi is to use two or three coils working together to be able to detect small targets medios and large, did experiments with two coils one coil for each mosfet then will mix the signals before operating it did not work, only works if you leave connected to operating one of the two coils yet noticed an increase in sensitivity which is what can be done to increase the depth and sensitivity of a pi?