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How to make a metal detector? Answered

Pheewww.....SCIENCE project!!

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sf49ers
sf49ers

7 years ago

I made my metal detector by getting a small, handheld radio and a calculator. First you turn on the radio to AM and find a station with just static and then you turn on the calculator and tape it to the back of the radio. When it detects metal the static should get louder.

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Toby Robb
Toby Robb

7 years ago

Metal detection relies on detecting the increase in the induction of a coil when it gets iron as its core. You basically have to build an induction meter.

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steveastrouk
steveastrouk

Answer 7 years ago

How does that work with gold then ?

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Toby Robb
Toby Robb

Answer 7 years ago

Iron is the only thing that conducts magnetic fields really well, so its the one that effects inductance in a coil the most. I think the other ways to detect other metals are sending a pulse with one coil and detecting the pulse with another. Nearby metals cause a delay in the pulse i believe.

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steveastrouk
steveastrouk

Answer 7 years ago

Precisely. So inductance is not the only method of detecting metals..

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rickharris
rickharris

7 years ago

Have a look at the related column on the right

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