Converting the radio into a 30 cm depth metal detector

We ask God for success for everyone

http://knozy.koom.ma/Ir3/f/DMpmJrq.jpg

Parts needed for the device with description:

The print file is ready

Programming fuse

FelezJoo PI printed circuit

hex programming file and microcontroller programming method

Here is the open hex link without counter:

https://drive.google.com/file/d/1CcOqzIQ3iYCSvK69NpU2O2MkvsM4U1/view

Here is the link to the original hex with counter:

https://drive.google.com/file/d/10f5Ku9Y_8TR4N3Or0LqjrzKhRmgTvBzE/view

With my sincere thanks to all who participated in the above information

My brother, the structure of distinguishing metals is due to the difference in frequency, meaning the wave reflected from the metal is translated by reading, so the maker of the device experimented with minerals on reality and then translated it into the controller by reading. and file

Dear brothers, what is the part responsible for discrimination in the felsgo device?

The part responsible for distinguishing between metals is purely programming. So that the developer calculated the dimensions of the wave and took reference values ​​which he called A B C. Those values in the air were 300 700 800 and they completely match the device that the developer manufactured. It is impossible to obtain the same values due to the impossibility of matching the designs and electronic parts with the original model.

When there is a target near the coil, the magnetic waves are affected under the influence of the induction field produced in the piece, and some dealy delay occurs on them, and the values of the super A B C change, from which the processor calculates the ID, even if the delay is large in the case of magnetized and ferrous metals, then the delay is large and the device directly cuts off the sound. The designer also set a specific maximum range for this delay. If the super values are outside the range, the message Coil Error is given, and in fact there is no defect in the file, but the readings are outside the range.

I had put a video to analyze the wave through isolation and on some metals such as gold and how the delay value increases when the target approaches the file.

To correct the discrimination and isolation feature in the absence of the source code, this delay can be modified by changing some resistors to obtain good ABC values without the need to make a new coil.

https://youtu.be/c7S3ACgc3SE

Here is all about the device

https://www.electromds.com/2019/09/felezjoo-pi.html

These are the firmware links

https://drive.google.com/file/d/12rSr75-XK7b52rH4R94VcGyBVfLphbEL/view

https://drive.google.com/file/d/1yrUcNgAblt9lG3pkdU-umFvyCNH0lhmc/view

These are buttons

http://www.arabsharing.com/do.php?id=169733

Here is the open hex link without counter:

https://drive.google.com/file/d/1CcOqzIQ3iYCSv-K69NpU2O2MkvsM4U-1/view

Here is the link to the original hex with counter:

https://drive.google.com/file/d/10f5Ku9Y_8TR4N3Or0LqjrzKhRmgTvBzE/view

.To you, my brothers, all the hexes of the Phleggio in a copy:

● Download firmware version 3.35 (unlimited version. The timer has been canceled)

http://www.arabsharing.com/do.php

Parts needed to assemble the FelezJoo PI

This is the list of necessary parts for assembling the machine, the values and the quality of the parts must be considered to get a good performance of the machine.

Resistors

R1, R17, R21………….…….1K

R2, R16 ……………………….47 ohm

R3………………………………10K

R4, R14, R20 …………………….4.7K

R5, R18…………………….…. 2.2K

R6, R15……………………. 10 ohm

R7………………………………..1.5K

R8…………………………..1.8K

R9………………………………..1M one mega-ohms

R10………………………….…. 100 ohm

R11, R12 …………………….390 ohm - 2W

R13………………………….. 18K

R19………………………….. 22K * All 0.25W1% carbon film

Capacitors

C1……………………………………. 10uF-16v electrolytic

C2, C3 ……………………………….18pF ceramic

C4, C5, C7, C8, C9, C14 ......... 100nF (or Code 104) ceramic

C18, C20, C21, C23, C26.......100nF (or Code 104) ceramic

C6, C12 ……………………………….100uF-16v (or Code 107) Tantalum

C10 …………………………………..5pF (or 4.7pF) ceramic-high quality

C11……………………………………. 2.2uF-16v (or Code 225) Tantalum

C13, C17, C25 ……………….…….470uF-16v electrolytic

C15, C16 ……………………..………….4700uF-16v electrolytic

C19, C22 …………………………….1000uF-16v electrolytic

C24…………………………………….2200uF-25v electrolytic

  * Ceramic capacitor voltage isn't important-

*you can use a capacitor with higher voltage but don't use capacitors with lower-

effort at all.

Integrated Circuits

(U1………………..ATmega328P-PU (microcontroller) Type 28 pin

(U2……………….. LF357N, not fake (LF357H metal, LF157, LF257

U3…………. . L7805CV, high quality 5V regulator

U4…………. . L7812CV12 volts 1.5 A, high quality regulator + small and strong

Transistors

T1……………………BS170 original

T2…………………….IRF840 or IRF740 (MOSFET)

T3……………………BC337

Other necessary parts

X………… 20MHz crystal 20 MHz

D1, D2 ………………………..1N4148 diode

D3 ……………………………..1N5819 diode

LCD………………………………..16*2 character LCD with backlit

SP……………… ……… small 8 ohm speaker, 0.2 W or more piezoelectric speaker

BAT………………………………. Battery 18 to 24 V, 2-4 amps

Coil …………………………... 350uH - 1 ohm - Spider-loop search (proposed

S………………………………. 5. high quality push button mounted box mode Contact

PCB…………………………..... 7.3 x 7.9 cm fiber - rather than fiberglass

In my experiment with felsgo, I modified the R11 resistor

To 590, its performance became much better, the sensitivity of the soil decreased, and its depth became better

The file was worked on as follows

Insulated copper wire, 90 square centimeters, 1 millimeter, 500 microns

And the plus settings are 350

and evidence 40

The rhinoceros 3

Frequency 400

Of course, the modification is only for using large files