Metal detector non-contact metal induction detection module

Non-Contact Metal Detector Module
This module is a "closed-loop" detection system. Unlike industrial proximity sensors that send a signal to a computer, this module is designed to give you instant feedback via an onboard buzzer. It is the perfect starting point for building DIY security gates or hidden metal-finding robots.

 
Why it’s a Project Favourite:
• Instant Audio Feedback: The built-in buzzer means you don't need to write code or use a screen to know it's working. As soon as it "sees" metal, it sounds an alert, making it great for standalone battery-operated gadgets.
• Tuneable Sensitivity: The onboard potentiometer allows you to fine-tune the detection range. You can set it to be very sensitive (detecting metal from a distance) or dull it down so it only triggers when touched.
• Educational LC Principle: This module is a practical demonstration of Eddy Currents. It’s a fantastic tool for teaching students how magnetic fields interact with different materials like iron, copper, and aluminium.
• High Portability: Because it runs on a simple 5V DC supply, it can be powered by a standard power bank, a 9V battery (with a 5V regulator), or directly from an Arduino.

 
Technical Capabilities:
• Operating Voltage: 5V DC.
• Detection Range: Optimized for short-range detection (approximately 1 cm).
• Inductive Technology: Specifically tuned to detect conductive metals; it will ignore plastic, wood, and glass.
• Alert System: Integrated piezo buzzer.

 
Best For:
This module is the primary choice for science fair projects, DIY treasure hunter toys, sorting machines (separating metal from plastic), and simple security alarms.