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

[jladre]

Use it.

[ivconic]

thanx for help i have 4007 and it's the same as 4001 will use that and see

!?!?!?!?

[freso]

i will when the atmega and usbasp arrive ..... i hope till then someone can give us a patched hex for the counter

[freso]

!?!?!?!?

i am new here ..... now i saw that i have to use quotes.....i am talking to jladre for some help

[baum7154]

Would it be possible for you to draw a simple picture of the coil you describe here in this post to detect 5x5mm soda can, and like in your video, is it like in post #400 ?? thanks.

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The coil in that post is the same configuration as the coil recommended by the author/designer of the Chance PI. I built several of them with the recommended 400uh inductance and they would not operate below 24us sample delay. This even though the coils had no shielding to slow them even further. I should also say that this was with the specified 390 ohm damping resistor.

Dan

[RS_Phil]

Did anyone try used dc-dc converter to out 18-19 volts with thier 12 volt batt? or better solution is to remove 7812?

[ivconic]

Did anyone try used dc-dc converter to out 18-19 volts with thier 12 volt batt? or better solution is to remove 7812?
[ATTACH]36063[/ATTACH]

I am using gel cell accu 12V/1.2Ah with addition of this one:



At first i used two 18650 with same dc/dc but those last not more than 20 minutes !
Than i replaced them with gel cell accu and it is BINGO!

[6666]

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The coil in that post is the same configuration as the coil recommended by the author/designer of the Chance PI. I built several of them with the recommended 400uh inductance and they would not operate below 24us sample delay. This even though the coils had no shielding to slow them even further. I should also say that this was with the specified 390 ohm damping resistor.

Dan

The coil in the picture looks very similar , but Jladre winds it different somehow, he has the magic formulae, as seen in his video, been trying to ask him to show us how,

[RS_Phil]

I am using gel cell accu 12V/1.2Ah with addition of this one:

[ATTACH]36064[/ATTACH]

At first i used two 18650 with same dc/dc but those last not more than 20 minutes !
Than i replaced them with gel cell accu and it is BINGO!

Thanks Ivconic for the info..

[reptooyep]

Maybe there is physical error on your pcb? Which one have you made?
And finally maybe you are using corrupted hex file?
Here are all the working and tested versions that i have, try each one of those and see:

Hi,
Thanks for your link, i tryed several download sources and also several softwares to unzip the hex file but still the same.
I also tryed with ATMEL ICE programmer which is not as convenient as usbasp for those chips.
Finaly, i'm tired of tha problem, i'll try later to make a new board.
The version i made is this one :PCB1.pdfPCB2.pdf
I think i'll download the latest version of the PCB and, in parallel, i'll make a new SMD one and share it.
Thanks

[RS_Phil]

Hi,
Thanks for your link, i tryed several download sources and also several softwares to unzip the hex file but still the same.
I also tryed with ATMEL ICE programmer which is not as convenient as usbasp for those chips.
Finaly, i'm tired of tha problem, i'll try later to make a new board.
The version i made is this one :[ATTACH]36065[/ATTACH][ATTACH]36066[/ATTACH]
I think i'll download the latest version of the PCB and, in parallel, i'll make a new SMD one and share it.
Thanks

I used same board but I see no problem..

[jladre]

I used same board but I see no problem..
[ATTACH]36070[/ATTACH]

your speaker looks like from old dvd player?

[mickstv]

Hi jladre, could you please post a CRO picture of what your seeing on the output of the preamp IC, using the coil from the YouTube clip.

Thanks
Mick

[bernte_one]

and how would this work with a 4*18650 holder and one step down modul
should be more efficient and less weight then lead gel

[jladre]

I would like to share that to ensure maximum function of your machine avoid using components from fairchild, not that i discredit that company but mostly of thier parts are low performance.. It is better to use voltage regulator from STMicroelectronics because i found out that parts came from them perform well. For the voltage regulator try to have those which have cv on the end liie L7805cv and L7812cv. And for the mosfet those came from IR is excellent..

I will also suggest to use IRF740 rather than 840. Any way you can try some mosfet because this machine is so versatile on it..
About the coil I will share the design when I have the material to build another one because previous coil is totally sealed.


People are talking and criticizing my last video.. One thing is for sure there is no tricks on it.. Sometimes there are things you like to share but some reason hold you to not do..