Aniket Singh

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@aniketxai

I’m a Full Stack Developer and IoT/Arduino Innovator. I build smart web apps and intelligent devices. On this site, I share coding tutorials, tech projects, and blogs related to web dev, embedded systems, and startup building.

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How do you make a simple metal detector circuit?

Hello Guys, In this post we learn how to make simple metal detector circuit in easy way and cheap in price.

*Parts Required & Components

+9 supply voltage
555 IC
47KΩ resistor
2.2µF capacitor (2 pieces)
Speaker (8Ω)
170Turns of 10cm diameter coil (any gauge would work)

*Schematics & Diagrams

-do all the connection according to this diagram.

*Tips

Enamel should be removed at the tips of coil for soldering connections.
With different gauge we will have different RLC impedance, so one should experiment with resistance in RLC circuit for sensitive metal detection.
The speaker can be of any type. But with resistance less than 8Ω, the timer might get heated.
Use supply voltage higher than 5V.

*Preview

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