felezjoo PI(the best pulse induction metal detector that I made until now)

[ivconic]

About R19... i see possible confusions here among some members.
R19 is NOT regulating NO working voltage!
By adjusting it is not possible to adjust and set any of the working voltages.
R19 (on my pcb is trimmer 20k) is serving there only to provide voltage reference for accurate LCD displaying of state on the battery.
I replaced resistor with trimmer only to be able to fine readjust and trim the value which will be displayed on LCD.
It's completely irrelevant and you may use resistor instead.

[liudengyuan]

Tell you again, felezjoopi is unstable, detection distance is very short, the designer's idea is wrong, since it cannot effectively distinguish between the iron, then he should put the detection range in the first, but the hardware is too simple, he should be to use the program in delta pulse, in this way, it will be a good machine

[Speedy_G]

Tell you again, felezjoopi is unstable, detection distance is very short, the designer's idea is wrong, since it cannot effectively distinguish between the iron, then he should put the detection range in the first, but the hardware is too simple, he should be to use the program in delta pulse, in this way, it will be a good machine

Hi liudengyuan


It appears that there might be some truth in your statement that FelezJoopi is "...unstable, detection distance is very short, the designer's idea is wrong, since it cannot effectively distinguish between the iron....".


For example, if you go to the Persian forum on the felezjooPI (https://www.felezjoo.com/viewtopic.php?f=8&t=2182) of which there are 1745 pages (and 17442 posts!), you will discover that many builders of the felezjooPI all have
roughly the SAME problem... they cannot get their final felezjooPI build to give them the three recommended magic 'debug numbers', viz. A= 300; B=700; C=800.


So, to demonstrate that 'problem', I did a very simple calculation ... I averaged those values obtained by some 10 dissatisfied 'Persian forum posters' and I am sure that there are many, many more falling into this 'wrong numbers' category!


Below are some 'debug numbers' obtained by some 'dissatisfied and frustrated felezjooPI experimenters from the Persian forum (I have calculated their averages which appear at the end of the rows):


A 180 A 165 A 104 A 280 A 249 A 161 A 207 A 230 A 295 A 245 ....Average A: 212
B 542 B 385 B 384 B 680 B 648 B 338 B 588 B 660 B 682 B 630 ....Average B: 554
C 708 C 518 C 446 C 770 C 796 C 479 C 735 C 770 C 763 C 740 ....Average C: 673


Furthermore, it appears that the function, A=300 is the most important 'debug number' that determines the 'successful iron removal settings'. As you can very well see for yourseves, the average debug value for A
of 212 (from the above posters) is a far cry from the recommended value of 300 - so iron rejection will NEVER work for those builders/experimenters - hence their complaints.


So there it is - in plain numbers - it is virtually impossible for the average metal detector builder and/or experimenter to achieve the kind of 'accuracy' that building the felezjooPI detector demands...
unless you have a well-equipped electronics workshop or run a 'professional/commercial' electronics factory.


Hope this helps us to understand a little more about the FelezJoo PI problems that are generally encountered out there in the 'real world'. ;-)


Ciao


Speedy_G

[ivconic]

"... it appears that the function, A=300 is the most important 'debug number' that determines the 'successful iron removal settings'..."

This is interesting to me, because i failed to find info on those numbers and their actual meanings.
Can you provide complete info ?
What exactly those numbers mean?
I also got different numbers but my detector is discriminating? How come?
(right now i don't remember the numbers, next time i will check them)

[Speedy_G]

"... it appears that the function, A=300 is the most important 'debug number' that determines the 'successful iron removal settings'..."

This is interesting to me, because i failed to find info on those numbers and their actual meanings.
Can you provide complete info ?
What exactly those numbers mean?
I also got different numbers but my detector is discriminating? How come?
(right now i don't remember the numbers, next time i will check them)

Hi Ivconic

I think that it is interesting to everyone who is keen to build this new type of PI detector, not only you...

I am only able to provide you with the info that you are looking for on the 'debug number "A", since Engineer Mr Hamid has given us that information on his felezjooPI blogsite (see post: https://www.felezjoo.com/viewtopic.p...82&start=17260).

See below for an extract from the Persian/Farsi post of Engineer Mr Hamid:
هست که لوپ شما با بخش تفکیک مشکل داره. توضیح دادیم که دیلی اتومات حدود 20 و اعداد سه گانه در رنج درست بخصوص عدد اول (A) حدود 300 نقش اساسی در کارکرد سیستم حذف آهن دارن. دیلی 16 برای لوپ شما

English translation (Google Translate) goes something like this (it would obviously be much nicer if the translation was given by a competent Iranian member of this Geotech1 forum):


You got a problem with the resolution is that loop. Daily automatic explained that 20 triple in the right range and numbers, especially primes (A) 300 central role in the functioning of Darren iron removal system.
"...The problem that you have with the coil is that of resolution. The automatic delay is set at 20; The debug numbers, especially A=300 plays a central role in the functioning of the 'iron removal system'..."

Ciao

Speedy_G

[ivconic]

I see.
I got somewhat similar result when try to translate it from Farsi.
It appears logical to understand and yet...
That's why i didn't payed much attention on what was written on forums and in few articles.
Better not knowing such partial details than to rely on them.
And by certain effort and lot of trials&errors eventually i came up with decent working device.
It is quite alright now. Working and discriminating (in good range of acceptance of fact that there is no perfect PI discrimination seen yet).
Final conclusion would be that coil is crucial, construction of the coil.
And LF357 with it's features is mandatory.

[timekiller]

Hello . I did this device, but have unexpected problems. Start lasts 1 minute, after the start of Reading an slowed targets for 10 seconds. Burning the Bootloader atmega 328p optiboot_atmega328.hex , any ideas for solving the problem ?

[eclipse]

Set correct fuse bits.

[TreasureHunter]

Hello guys!

Is it possible to get the original C source code instead of the .hex file? I would need the original so I could make a scetch in Arduino IDE and then upload it. Also I would like to make a simplified version, so for that I would need to modify the source code..
Thanks in advance for help!

TH

[ODM]

Source code is an iranian national secret

[TreasureHunter]

Source code is an iranian national secret

But can You at least give me a simplified version? Because I need this for my thesis work at the university, and I won't use an LCD screen. So all the menus and options are useless for me, I just need the automated stuff:
- Ground: (automatically adapt to the ground)
- Iron Reject: (iron removal)
- and the basic sensing stuff which is automated I think

All the other stuff I don't need, so I would be very glad if I could get a simpler version of this!
لطفا

this is my email address: [email protected]

[jladre]

But can You at least give me a simplified version? Because I need this for my thesis work at the university, and I won't use an LCD screen. So all the menus and options are useless for me, I just need the automated stuff:
- Ground: (automatically adapt to the ground)
- Iron Reject: (iron removal)
- and the basic sensing stuff which is automated I think

All the other stuff I don't need, so I would be very glad if I could get a simpler version of this!
لطفا

this is my email address: [email protected]

Look for clone pi-w they dont need lcd display.

[TreasureHunter]

and which type of coil this mashine uses? 1 round coil? Or 2 DD coils, or concentric circles?

[jladre]

and which type of coil this mashine uses? 1 round coil? Or 2 DD coils, or concentric circles?

It works with spider wound mono coil.

[timekiller]

Hello again. My PI md works, after setting correct fuse bits .It works well with all my coils of previous projects. But there is a new problem, count of starts is not reset after reprogramming atmega 328p .It is against the following-At the end of 300 times,with a programming can be re-used again and again to set up the system. Doesthissoftware solution ?