Design a metal detector by using beat frequency technique: article / Mohd Zharif Othman

Nowadays, many different types of metal detector are available ready built, some of which provide advanced functions and are microprocessor
controlled. The intention is not to emulate the performance and features of this unit as top of the range detector often complex and costly. Several methods can be used in order to detect metal. This project is to conducting a metal detector which the metal detector can detect any metal by using the concept of beat frequency oscillator (BFO). This prototype consists of an oscillator producing an alternating current that passes through a coil producing an alternating magnetic field. The purpose to do this prototype is to make an easier to human for example to helps soldiers to find bombs or landmines that had been buried in the soil.