Metal Detector

Simple metal detector circuits

This is a simple metal detector circuit, Can find various metal and adjustable sensitivity Easy to use to place near metal. The circuit inside include a few components has IC-NE556 is at the heart of the circuit, with principle of Monostable multivibrator then show on Moving Coil Type Meter. The working principle This project use […]

Home Made Metal Detector

This homemade metal detector circuit will help you find objects composed of materials with relatively high magnetic permeability. It is not suitable for buried coins discovery that is not sensitive enough but you can detect pirates treasures! The metal detector is powered by 2 × 9V batteries, each of it charges with 15mA. L1 detector […]

Simple BFO Metal Locator

This circuit uses a single coil and nine components to make a particularly sensitive low-cost metal locator. It works on the principle of a beat frequency oscillator (BFO). The circuit incorporates two oscillators, both operating at about 40kHz. The first, IC1a, is a standard CMOS oscillator with its frequency adjustable via VR1. The frequency of […]

Single Transistor Metal Locator

This is a metal locator circuit. This circuit is useful to detect metal. This circuit uses a AM radio and one-transistor oscillator. This circuit is inexpensive. The correct bias is provided by R1 and the frequency of oscillation is determined by search coil, C4 and C3. The search coil is formed by inductor which has […]

A Simple Metal Detector Circuit Using Beat Frequency Oscillator (BFO)

Metal Detector Circuit Topology One of the simplest method of metal detecting is by beat frequency oscillator. Basically, the circuit consist of two balanced oscillator. One oscillator provides the reference signal, and other oscillator is acting as the detector element. The reference oscillator’s frequency is fix, while the detector oscillator is variable depending on the […]