Simple Metal Detector Circuit Using 9V Battery | DIY Electronics Project for Beginners
Learn how to make a simple metal detector circuit at home using a 9V battery, 2N2646 transistor, and search coil (L1). This easy DIY electronics project helps you detect metal objects nearby with a beep sound indicator. Perfect for students, hobbyists, and beginners in electronics.
In this video/image, you’ll understand the full circuit diagram, components list, and working principle of the metal detector project.
Components Used:
9V Battery
Push Button
Resistors: R1 (10K), R2 (4700), R3 (470)
Capacitor: C1 (0.1µF)
Transistor: 2N2646
Search Coil (L1)
Beep Speaker
📘 Working Principle:
When the search coil (L1) detects a metal, the oscillation changes and triggers a beep sound through the speaker — indicating the presence of metal.
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