It may seem difficult but it is not so much, making a homemade metal detector is possible if you follow the steps we give you below. To make a cheap metal detector using an old AM radio, tape, and a calculator, follow these steps:
Steps to follow:
1.Tune AM on your radio with the maximum volume at the upper end of the frequency, but not directly on a broadcasting station. Once you can hear the static of the AM radio, the radio and the position of the calculator (on) very close together until you hear a loud tone.
2.Next, you have to secure the radio and the calculator with the tape, stick them together.
We already have a metal detector working that can be experienced by placing it near silver or another piece of metal.
3.This works because the strong tone that comes from the radio is from the electronic circuit of the calculator that produces a radio frequency signal. The radio waves of the calculator bounce against the spoon and they are heard on the radio.
4.Attention , VERY IMPORTANT : this is a home experiment to know how a metal detector works, it is not to make a professional metal detector with a range of 5 meters below the ground, we make this clarification because some readers have unsuccessfully tested the experiment (in my case I tried it at the time, and although it works it does not have an accuracy to go looking for coins in the sand) we recommend that you experiment with used calculators and radios , since apparently several models (in particular calculators) They do not generate enough radio wave power.
