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This page will soon be updated and I will add all the information so that you can build this wireless metal detector. Everything already works but I still have to make final tests of the application before uploading it to PlayStore. To process the data in the smartphone we will use my new app “Spirit PI” Wirless Metal Detector.Īt the moment the project is in development mode.

To make it wireless I decided to use a bluetooth module hc-05 and in this way send the data received from the coil to the smartphone. This type of metal detector (pulse induction) works at very low frequency only about 60 Hz which allows us to process the signal easier, for example with the help of an Arduino microcontroller. The same coil sends the signal and then receives it. In this metal detector we only use one coil that at the same time is the transmitter coil Tx and the receiver coil Rx. It is easier to make than a VLF metal detector because you do not need to adjust the coils and adjust the balance of the coils. This metal detector is based on an Arduino or ESP32 microcontroller and a smartphone. “Spirit PI” is a pulse inductions metal detector.