Description: Metal Detector Module Contactless Induction

SQUARE Type Metal Detector 10mm Non-Contact Metal Induction Detection Module Contactless DC 3V 5V Metal Detector Sensor Locator Scanner Unassembled DIY Tool Sets Kit

You can use this LC Metal detector non-contact metal induction detection module as a metal detector. When it approaches any metal, it makes a sound.

This is a module specifically designed to detect metal. The module operates by inducing currents in metal objects and responding when it occurs. A nice onboard buzzer signals when it detects something and an onboard potentiometer allow adjustment of sensitivity.

The power cables of the Metal detector non-contact metal induction detection module will need soldering on for the module to function, positive to the outside of the module and negative between the potentiometer and an electrolytic capacitor.

The cheap module I received from China had no instruction manual or circuit diagram, so I had to do a lengthy Google search in order to get its basic schematic. In this concise primer you will have the schematic and all other details you need to know if you want to make a simple metal detector on your own. So, let’s start!

The clever part of the design is the single rectangular coil made by etching one continuous track on the printed circuit board. If you look very carefully at the printed circuit board, you can see that the rectangular coil is tapped at one turn i.e. a single coil with a precise tapping at one turn. The coil starts at the top side of the double-sided printed circuit board and makes square loops towards the center, A via in the center of the printed circuit board takes the coil to the other side of the printed circuit board and the same set of tracks are on the bottom side. Pretty nice!

 

 

A handful of commonly available discrete components remain including three bipolar junction transistors, a few resistors, and capacitors. The sounder in the module is a standard active piezo-buzzer, and there’s also a small trimpot to fine-tune the circuit. Here is the basic schematic of the metal detector module. I borrowed it from the seller’s webpage.

 

Features :

1. “V+” ↔ Connect to power positive
2. “V-” ↔ connect to power negative
3. Adjust the potentiometer, let the modules work normally.
4. Small and easy to use module.
5. It comes with a Buzzer for metal detection indication

Specifications:

• Working voltage: 5V DC.
• Detector distance: 1CM.
• Dimensions: 66 x 60 x 14mm.
• Weight: 15 gm.
• Redline: connect to power positive
• Black line: connect to power negative
• Adjust the potentiometer, let the modules work normally.

Package Include:

• 1 x Mini Metal Detector Module Contactless Induction