A metal detector is a very common tool used for checking the bags in persons, goods or shopping malls, hotels, cinema halls etc. to ensure that people do not take any metal or illegal things from guns, bombs etc. Used to be. Metal detectors have discovered that the presence of metals is of various types of metal detectors, such as hand-held metal detectors, run through metal detectors and ground search metal detectors. Metal detectors can be easily made and the circuit is not complicated for an original metal detector.