INSIGNIA LABS METAL DETECTOR KIT PROJECT FOR SCHOOL COLLEGE PROJECT(Multicolor)

The project is a FULLY ASSEMBLED KIT. Copper coil acts as inductance. The coil is fed into 555 IC. The capacitor & copper coil induces a frequency for the output signal from 555 IC. In case of any metal contacts with the copper coil, its frequency changes, thus changing the output signal frequency of 555 IC. This could be noticed with a small amount of change in the humming sound from speaker.