A simple metal detector

I can no doubt say that this is the easiest metal detector I've ever seen. At the core of which is just one chip TDA0161. You will not need to program anything - just collect and that's it. Still, its huge difference is that it does not make any noise at work, in contrast to the metal detector on the NE555 chip, which initially unpleasantly squeaks and the found metal should be guessed by its tone.
Simple Metal Detector
In this scheme, the buzzer starts beeping only when it detects metal. Chip TDA0161 is a specialized industrial version for induction sensors. And it basically builds metal detectors for production, giving a signal when the metal approaches the inductive sensor. You can buy such a microcircuit on -TDA0161 aliexpress.com It is not expensive and it is available to everyone .

Here is the scheme of a simple metal detector

Just a metal detector

Specificationsmetal detector

  • Voltage supply of the microcircuit: from 3.5 to 15V
  • Generator frequency: 8-10 kHz
  • Current consumption: 8-12 mA in alarm mode. About 1 mA is able to search.
  • Working temperature: from -55 to +100 degrees Celsius
The metal detector is not only very economical, but also very unpretentious. A battery from an old cell phone is well suited for powering. Reel:140-150 turns. The diameter of the coil is 5-6 cm. You can redo the coil of a larger diameter.
Simple metal detector
Sensitivity will depend directly on the size of the search coil. In the scheme I use both light and sound alarms. You can choose one thing, if you want. Buzzer with internal generator. Thanks to this simple scheme, you can make a pocket metal detector or a large metal detector, depending on what you need more.
Simple Metal Detector
After assembly, the metal detector works immediately and does not need to be configured, except for setting the threshold of operation with a variable resistor.Well, this is a standard procedure for a metal detector. So friends, collect the necessary thing and, as they say, in the farm will fit.
Date: 26.10.2018, 10:58 / Views: 61573

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