1, 2, 3, Metal Detector

In this Instructable learn ho to create a very simple, low cost metal detector. This is not the type of large scale metal detector you can use on the beach however,this can be used for finding where two studs in your walls meet ,locating the nails, a lost screw, screws, or just simply fooling around testing different objects around the house.

Metal Detector

A single chip metal detecor with a range of a few inches. This is useful for decting nails or screws in walls and floors, or for locating buried mains cable.

Make your own metal detector

Metal detectors use two oscillators, each of which produces a radio frequency.One of these oscillators uses a coil of wire that we call the search loop. The second oscillator uses a much smaller coil of wire, and is usually inside the control box and is called the reference oscillator.

Metal Detector

The circuit described here is that of a metal detector. The opera- tion of the circuit is based on superheterodyning principle which is commonly used in superhet receivers. The circuit utilises two RF oscillators.

Build your own metal detector

Metal detector

Metal detector uses single IC

uses a beat-frequency technique to detect coins and other metal objects near the search coil