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At first glance, the module is solidly made, the elements are precisely placed and well soldered. The price is less than $50, including postage. In this case, it is an SMD version of this detector, and you can find the same metal detector made with standard components made according to an identical schematic diagram.
The coil is identical to the one I use in my DIY Pulse Induction Metal Detectors, and consists of 25 turns of enameled copper wire with a diameter of 0.4 to 0.6mm. The diameter of the coil is 200 mm.
In order to put the metal detector into operation, it is necessary to solder only six wires, two from the power supply, two from the speaker, and two from the coil. The detector worked immediately after switching on, but only required some adjustment.
I am really pleasantly surprised by the features such as sensitivity and stability in operation, considering that it is a very inexpensive module, and to make a complete mid-range metal detector we need almost no knowledge from the field of electronics. All we have to do is solder a few wires, and the only thing is to be very careful about the polarity of the battery.
Detailed instructions, schematic and code at :
www.hackster.i...
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20 окт 2024
