Metal Detector Using Arduino

Metal detection plays an important role in security systems, industrial inspection, and material separation. Conventional metal detectors are often expensive and complex, making them unsuitable for small-scale or educational applications. This project presents a low-cost and portable metal detector using an Arduino Uno microcontroller The system works on the principle of electromagnetic induction, where a search coil generates a magnetic field and detects disturbances caused by nearby metallic objects. Changes in inductance and oscillation frequency are processed by the Arduino to identify the presence of metal. Audible and visual indicators provide instant feedback. The proposed system is simple, cost-effective, and suitable for learning as well as practical applications such as security checking and metal identification.