Metal Detector Circuit
A circuit that detects metal and also magnets.
Overview
When a magnet is brought close to the 10mH choke, the output frequency changes.
Schematic
Parts List
1x - NE555 Bipolar Timer
1x - 47K Resistor (1/4W)
2x - 2.2µF Electrolytic Capacitor (16V)
1x - 10µF Electrolytic Capacitor (16V)
1x - 10µF Electrolytic Capacitor (16V)
1x - 10mH Inductor
1x - 8 Ohm Speaker (1/4W)
1x - 9V Voltage Battery
View All Circuits
