DIY Metal Detector Kit 1. Introduction Metal Detector is a high performance metal detector designed for security. 2.Parameter NO. Parameter Value 1 Name Metal Detector 2 Operating Voltage DC 3-5V 3 Operating Current 40mA 4 Standby Current 5mA 5 Detection Distance 60mm 6 Alarm mode Sound/Light 7 Difficulty Easy 8 PCB Size 86*61mm 3.Application 1>. Game entertainment 2>. Security check 3>. Search for metal products 5>. Car detection 5>. Traffic Statistics 6>. Elevator floor control 7>. Production equipment position detection 8>. Production equipment development and design 9>. Electronic Product Design 10>. Play equipment development 11>. Metal proximity switch 12>. Metal detection in human body 4.Schematic 5.Component listing NO. Component Name PCB Marker Parameter QTY 1 Metal Film Resistor R3 470ohm 1 2 Metal Film Resistor R2 2K 1 3 Metal Film Resistor R1 200K 1 4 Potentiometer VR1 100R 1 5 Ceramic Capacitor C2,C3 0.022uf 2 6 Ceramic Capacitor C1,C4 0.1uf 2 7 Electrolytic Capacitor C5 100uf 1 8 Red LED LED1 5mm 1 9 S9012 Q2.Q3 TO-92 2 10 S9018 Q1 TO-92 1 11 Power Switch SW1 6*5mm 1 12 Buzzer SP1 9*12mm 1 13 Power Socket J1 KF301-2P 1 14 PCB MDS-60 1