Metal Detector(Red Ver.)

Schematic Diagram and Component List

You will need the following components to complete this project:

Procedures

Place and solder the resistors.

Place and solder the 104 ceramic capacitors.

Place and solder the 222 polyester capacitors.

Place and solder the 100uF electrolytic capacitor.

Place and solder the triodes.

Place and solder the buzzer and potentiometer.

Connect the power supply wires, be aware of polarity.

Attach the battery coil to the power supply wire. This coil is designed to hold and connect to a batteries.

Insert the PCB and battery coils into the case.

When power is on, start by adjusting RP1 until the buzzer emits a sound. Then slowly adjust RP1 in the opposite direction until the buzzer just stops making sound. When metal object is in range, the buzzer will start to make sound again.