» Electronics » Metal detectors »Metal Detector Kid FM2 v2 (new version)

Metal Detector Kid FM2 v2 (new version)

Advanced circuit metal detector Kid FM2 version 2, FV2v2.



In this scheme, the firmware of the PIC microcontroller is seriously improved.
Firmware files now exist separately for both PIC12F675 and
and for PIC12F629, but this is only for version FM2 v2.



The essence of the firmware upgrade:
-Frequency now does not walk, that is, it is often not necessary to restart the baby, it has become very stable, I personally tested it, restarted it all day only when the coil bent accidentally; it is not flooded with me.

-Added power on alert function. For example, if you put it and forgot to turn it off, the baby every 2 minutes will remind himself of a pleasant sound.

-Also added a function of indicating the battery charge. If the battery voltage drops below 5.5 volts, the detector will emit a characteristic signal and both LEDs will light up. But this function is only possible with the PIC12F675. In 629, this function is not.
The circuit itself is also slightly modified, but not much, just added a couple of resistors.

Here is the diagram itself.


The circuit uses a LM317 voltage stabilizer, pinout of its legs from the bottom in the photo.



The board itself was quite compact.




And easily fits in a small case.




At the huge request of all the inhabitants of our sites, not too lazy and compiled the entire list of the necessary components. All of them are presented in the photo.

Metal Detector Kid FM2 v2 (new version)


The inductance of the coil in this metal detector. Now it’s 1500 mH,
Look, make no mistake when you reel the coil through the program. It is better to wind through Coil32 program, see how to wind win in my previous articles and the program is there too.

Who needs already flashed microcontrollers PIC12F675 or PIC12f629 contact me by mail

Well, of course, below is a video of the work of this metal detector, as well as firmware files and a circuit board file.



metfm2_675_v2.rar [2.24 Kb] (downloads: 6316)


metfm2_629_v2.rar [2.04 Kb] (downloads: 5198)


plata-malyshfm2_v2.rar [14.41 Kb] (downloads: 6760)
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60 comments
Guest Victor
Hello. How do you order such a device ready with firmware as in the video? Price. With a coil with a diameter of 25 mm.
Jim
I understand 1500mkg.
Jim
I understand 1500 mcG. micro Henry therefore
Albert
most likely you have a flimsy coil, elastic. when the position of the coil turns is changed (it’s touched by hand, the wind blew), the turns are shifted changing the inductance, and as a result, the frequency of the resonant circuit, and the controller reacts to it as if something had brought metal to the coil. karoche helps pouring into the epoxy. the coil must be tight
lastik
Hello, tell me please, there are two problems. He assembled the baby, everything works in the room, but it’s enough to go out to the street where a small breeze blows and it goes into a constant squeak, when you reboot after 2-3 seconds it goes into uncontrolled squeak again.
And even if you bring the baby too close to the ground, it begins to squeak, as if it had found something.
The article has this firmware - download it.
Guest Leonid
Need firmware on 629 pliz.
Tell me, the list contains 2 output resistors on the 220th and 10th, but they are not on the board, only smd on the board. So which resistors to put then?
Your advice is not correct. Toddler and Tracker are two completely different metal detectors. The advantages of the Kid are that when micro-dimensions discriminates color and ferrous metals. It is easily realized in underwater execution. (That's exactly what I did) The tracker is good on land in its own way. It has the benefits of an impulse. However, carrying it under water ...
Well, if you do then Quasar AWP. on the principle of induction balance. It separates any metals and alloys, but requires some knowledge in electronics and search theory. I made the fifth version from Ozzy_SV. Very satisfied.
Dear Author! Your development deserves the highest praise! I have done and have been using it for the second year. But, it seems to me, it would be more expedient to supply power from one Li-Io battery. Has anyone tried such a solution in practice?
Cool md kid fm2
Kind time of the day, I need help, I also collected the baby peeps without stopping, and when I do not press the button, you press the squeak, only the LEDs light up (Conder changed to 22nf, changed the jumper and removed it completely) all in vain.
Tell me which button to choose and where to put the jumper (assembled, turned on and silence when the button is pressed there is a weak click in the speaker) do not judge strictly this is my first build.
Tell me the assembled metal detector but it gives out 10-15 short beeps, then one long and 4 short beeps, this is a mistake, as I understand it, what could be the reason?
The question is, is it miligenry or microgenry?
"The inductance of the coil in this detector. Now is 1,500 mH."
Correct as in the circuit diagram
It must be selected in order to get 3.4 volts at the output of lm317.
Better from a nail or chalk.
This means you need to make CP bit Disable.
Do not screw the pinout LM 317lz !!! according to the datasheet - right pin-input, middle output, left adjustment (ajustment)
I put together an underwater version, it works well, but you need equipment for a normal underwater search. Snorkeling is very uncomfortable. Anyway, with it you dig the bottom if you look for where a lot of garbage.I advise you to collect it for further training and buy a normal metal detector, as I did))) I save up buy an underwater.
For underwater work you need something more powerful than this Kid FM. Use PI, e.g. Tracker PI-2
Quote: To Delusam
I have already recommended this to them.

Yes, I remember recently. But to read, to engage in self-education, to consistently go to your goal from small tasks to large ones - this is not interesting. But quickly and without understanding - yes, this is our way. Only benefit from this - no. And sense, too.
Quote: Ivan_Pokhmelev
Quote: Areksander Filatov
I’m successfully remoting electronics around the house by typing successfully, hands are growing as they should.
If your hands grow correctly, make money with them and buy a finished product, it will turn out cheaper, better and faster.

Right and good advice, I have already recommended this to them. But our hands are growing correctly and we think (or rather we don’t think) ....?!
If you want to feed a person, give him a fishing rod. Not fish ...
Someone said, I don’t remember ...
yes
Quote: Areksander Filatov
I’m successfully remoting electronics around the house by typing successfully, my hands are growing as they should.
If your hands grow correctly, make money with them and buy a finished product, it will turn out cheaper, better and faster.
Dear Author! Please help please! My dream is to collect MD Toddler fm2 v2 compact, underwater if there would be a fairy tale with control on the reed switch in general but not fat. I’m quite tight at this, but at home I rewind electronics by typing successfully, my hands grow as they should. The problem is that I went with your list of parts for the MD store. They ask me questions about capacitance, voltage, etc. I can not help them because "firewood" itself!
Is it possible to see the microcontroller programming code itself?
An error popped up while flashing the PIC12f629 controller. What does it mean?
Author
Quote: elnur
Alex_2016 Did you find the problem? I already collected the second, in DIP the same problem.

No ... knowledgeable people said to check with an oscilloscope whether the generator gives 15-20 MHz for 5 legs. I do not give out need to watch the generator
Alex_2016 Did you find the problem? I already collected the second, in DIP the same problem.
Everything on the printed circuit board is reduced to ground, R1 and R12 are reduced to 1KΩ to ground via a button, or use a jumper. I, too, first stupid on this.
Yes, Constant also knocked down a table, but did everything. 317 but it’s not a problem, only on the printed circuit board it has r1 and r12 to the mass they are not average, but on the circuit are average.
When I assembled, I encountered the following problems: LM317 stabilizer, LEDs of different voltages, picked up capacitors, and firmware - I forgot the constant.
The LEDs flash when turned on, while lowering 5.5V, they also flash. And the piezoelectric element squeaks constantly.
Quote: Alex_2016
Nothing changes constantly squeaks ... replacing capacitors does not affect he tortured me specifically.
Nothing changes constantly squeaks ... replacing capacitors does not affect he tortured me specifically.
With a squeak of 33nf, set 22nf + 1nf - peak and fute, and it works.
And how does it peal, monotonously, or 12-15 peaks, then 1 long and 4 short?
At the selection stage, you can use any other than frank shit, and after the face value is selected, put a film (or other high-quality thermostable).
Yes, replace the film 22, and solder the film too using the pump method.
I don’t have 33 film stands, Replace with 22? and what to add also film?
I had the same, put Conder 22 instead of 33? the one that is parallel to the coil, and added others to it in parallel (from 1 to 10nf), and earned by typing with 1nf.
Please help me figure it out, I collected everything I requested, and it just squeaks without stopping, what should I do ???
Hello, I’m interested in your metal detector Kid FM2. I would like to get the same from you!
Is it possible and what price! I am in Russia, Krasnodar Territory!
Author, tell me 22 nF or 33 nF to take a capacitor? The program costs 22
It’s just exactly the same, buzzer called, less than 5 volts did not find, will it work?
Quote: elnur
Tell me, how many volt speaker did you use?

I use 8 ohms 0.5 - 1 watts.
Tell me, how many volt speaker did you use?
Author
yes, from the attached collect

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