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

[useus]

today first use in the field, various findings even at 28cm depth!
my felezjoo is finally completed and fully functional! he is really sensitive, he found me an m4 nut about 10cm below the ground.
I can safely use sensitivity 18 with unshielded flat spiral coil.
I shielded the electronics box,
mounted C14 / C26 green cap capacitor and replaced R10 with 15ohm as refinement of debug values.

[useus]

do you think it is possible to increase the working frequency beyond 999hz, perhaps using a frequency multiplier?

[Kostasp]

Yes, RDump already on pcb [ATTACH]49565[/ATTACH]

thanks

[ionut_mtb]

thanks, are you say that dont need resistor in coil is ready in pcb

Yes, RDump already on pcb

[Kostasp]

In this circuit if you follow the exact schematic, pcb, value of conponents and coil construction you don’t need to modify dumping resistor

thanks, are you say that dont need resistor in coil is ready in pcb

[ionut_mtb]

Ηι, who is the right way to calculate the damping resistor for coil ?
i find this : Rd= pi*L*circuit resonance

In this circuit if you follow the exact schematic, pcb, value of conponents and coil construction you don’t need to modify dumping resistor

[Kostasp]

Here are another way - you can connect ten resistors all by 50 Ohm in series and chouse optimal resistance with 50 Ohm step manualy.

thanks, but how i know when to stop i dont have any special eguipment

[Vadim18]

Ηι, who is the right way to calculate the damping resistor for coil ?
i find this : Rd= pi*L*circuit resonance

Here are another way - you can connect ten resistors all by 50 Ohm in series and chouse optimal resistance with 50 Ohm step manualy.

[Kostasp]

Ηι, who is the right way to calculate the damping resistor for coil ?
i find this : Rd= pi*L*circuit resonance

[ionut_mtb]

I use v3.35, the last one, you ca find it here on the forum. To find answers to all your questions you can use “search thread” on top of the page. More clear info you can find diectly on felezjoo website on iranian forum, use google translate.

[Ruben2000]

Thank you very much ionut_mtb.
I would like to know what the last hex file is for; Paloma gave me two files and I don't know what the difference is between the two.

[ionut_mtb]

Hi ionut_mtb, the video has helped me.
I want to make you a query; When I load the hex file and press the read button, the fuses appear automatically but they are incorrect according to what the creator proposes.
My question is: should I change it manually?
Here I leave you an image.
[ATTACH]49508[/ATTACH]

i don't remember how i did, it was long ago and it worked when i first try.
see this video:

https://www.youtube.com/watch?v=CkjcMlaSVK0&feature=youtu.be

[Ruben2000]

Hi ionut_mtb, the video has helped me.
I want to make you a query; When I load the hex file and press the read button, the fuses appear automatically but they are incorrect according to what the creator proposes.
My question is: should I change it manually?
Here I leave you an image.

[Ruben2000]

Originally Posted by Ruben2000
Does anyone know how I can publish images and files?



Click on the "Go Advanced" button and "Manage Attachments".


Thank you very much Qiaozhi.

[Ruben2000]

Attached Files

• felezjoo full edit 3.35.rar (19.2 KB, 24 views)
• felezjoo full M 3.35 (10).rar (19.2 KB, 26 views)

Paloma, what is the difference between the two?