Ready-made board of the metal detector Pirate. 

The size of the board 30/67mm. Speaker included. The board is soldered and tested.

Can work with coils of various sizes. With a 25cm coil, the search depth is up to 1.2 meters.

With a frame 1.5x1.5m large metal up to 3 meters.

The Pirat metal detector is one of the most famous because of its simplicity and quite good characteristics.  

Tuning of the Pirate metal detector

A properly assembled metal detector does not need fine tuning, but for fine tuning there are two variable resistors R12 and R13 in the circuit. To tune it, turn R12 and R13 until you get rare clicks in the speaker. Before tuning, turn on the metal detector and wait 10-20 seconds. Move all metal objects away from the search coil.

Specifications

• Coin detection depth with coil 25cm -  to 20 - 22 cm
• Depth of detection of large objects with coil 25cm - 100 - 120 cm
• Depth of detection of large objects with frame 1,5x1,5m - to 3m
• Supply voltage, 9 - 14 V (12V recomend)
• Current consumption, 60 - 70 mA
• Impulse current consumption, 1 - 2 A
• Board dimensions, 30 X 67 mm