Connecting the volume and power supply to Surf PI 1.2 | Detector de metais, Eletrônica, Metal
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Surf PI Longboard DIY Metal Detector part#1 build - YouTube
How to build Silverdogs Surf Pi 1.2 detector
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PI metal detector for deep searching | video recording, metal detector | Little video how work this detector. The coil is small 27 cm diameter, but detector can use various coils -
Surf PI | Through the Square Window
HOW TO DIY ONE OF THE BEST METAL DETECTOR CIRCUITS. - YouTube