Italian pulse detector Nuova-elettronica-245

[rxlock2]

the following link contains a pulsed metal detector. Has anyone built it?
https://www.arduinotronics.com/rivis...ca-numero-245/

[bernte_one]

i started, but main problem is that you can?t buy the main pcb anymore
so task is to redraw by pictures and shematic

[MDfanatic]

Maybe I could draw the schematic on EasyEDA and convert it to PCB for orderding through jlcpcb.com with corresponding parts from lcsc.com if anyone is interested.

[dbanner]

I'm sorry for not replying sooner. I was wrong. Build the thing. We will work out the difference. When we get there, we will cross that bridge. Good luck to you.

[bernte_one]

Maybe I could draw the schematic on EasyEDA and convert it to PCB for orderding through jlcpcb.com with corresponding parts from lcsc.com if anyone is interested.

sounds like a good idea

i would would copy layout with sprintlayout, but with easyeda from schematic to pcb generator is more straight forward
i have only some wish if you do that
-potis direct to pcb like in original layout so it can be mounted direct to the enclosure frontplate
-add some testpoints on pcb, so it would be easier to hook up the oszi test probes (in the pdf docu there are shown some timing diagrams)

[dom44]

By the way guys there is an error on the circuit diagram output of ic6-B goes to pin 4 of the TDA7052 but according to data sheet pin 4 is NC ??? just noticed there are two versions of the TDA7052 the one marked TDA7052B is correct pin 4 goes to volume.

[amindevil]

is there any chance to English version of this magazine? Thanks in advance.I've made an italian metal detector and it works fine

[dom44]

IF this helps its an OCR translation of the article

https://gofile.io/d/4gWD2y

[perzo]

By the way guys there is an error on the circuit diagram output of ic6-B goes to pin 4 of the TDA7052 but according to data sheet pin 4 is NC ??? just noticed there are two versions of the TDA7052 the one marked TDA7052B is correct pin 4 goes to volume.

Hidom44 circui is corect.pin2 conect to ocilator and pin4 to voltage.of integrator.opamp 6b.

[dom44]

Yes i know i think its important people know there are two versions of the TDA7052 one has pin 4 connected to volume level control the other has no connection and marked NC so you must get the version "B" or will not work. If you look on aliexpress you will find they sell TDA7052A , TDA7052B but don't give you a choice one will work one will not.

[6666]

IF this helps its an OCR translation of the article

https://gofile.io/d/4gWD2y

What is supposed to happen when you click this link ?, all I get is a page opens and says
Translating...

even if you hit the download button

[dom44]

scroll down the page you will see the translated text and look at the original you will get the context.

[6666]

scroll down the page you will see the translated text and look at the original you will get the context.

Thanks, got it sorted now, was expecting something else.

[MDfanatic]

I'm having a hard time locating all the needed parts because some are old and obsolete and I couldn't find a proper replacement.
It also does not mention what are the values of the toroidal transformer so this project is most likely obsolete, unless someone finds alternative parts or ways to complete the project.

Although I'm almost done on the schematic redrawing it seems pointless to continue at this point.

If someone is interested on continuing the schematic, you will find it on EasyEDA.com with project title "Rivista Nuova Elettronica #245".

[dom44]

I am drawing the board now the transformer is no biggy just needs plus and minus 12v many ways to generate that i have ordered the TDA7052-B from Aliexpress I asked for the correct one hopefully i get it. LM6218 is only sticking point and i am not sure why they went all exotic with that only works at 67hz according to the text, i will try substitutes the rest is not a problem.


was done in a rush not yet checked properly a second opinion would be helpful.