Silver Star Hungary

[ivconic]

[ivconic]

[ivconic]

I accidentally "dug" it on some pages on the Internet. From an old Hungarian magazine. Very poor quality and resolution; so I had to draw everything myself.
Perhaps a colleagues from Hungary could help with the details. It interested me because it is non-motion.

[ivconic]

Source here: https://www.metaldetector.hu/fepites.html

[MDfanatic]

If anyone's interested building this project, I could redesign the PCB on EasyEDA with SMD in a compact form and share it as a project for the forum.

[ivconic]

If anyone's interested building this project, I could redesign the PCB on EasyEDA with SMD in a compact form and share it as a project for the forum.

That would be nice.
I am making my pcbs at JLPcb.
The main problem I have is when preparing production files.
I work only in Sprint Layout 5 and 6.
Sprint Layout can export gerbers and JLPcb accept those fine, no problem with that at all.
But the problem is with fabrication files; "Pick'n place" file actually.
Sprint can not generate it automatically (or I don't know how), I have to define each from the componentes manually.
Lot of tedious job. I am not lazy, so I tried. But I got all mixed up with standards when it comes to component coordinates.
I tried this and that... uploaded many attempts to JLPcb and it reports me always "not good files" end rejects them.
Huge problem for me when i want they to do the assembly; full or partial (only tiny components).
As time goes by I am more and more pushed to work SMD and smaller and smaller sizes.
Only way for me to work with such boards is to let the JLPcb to do the assembly. Which is not that expensive at all (depends on components prices).
So... if you gonna prepare files for SMD; can you also prepare fabrication files as well?
...
This problem I have deserves separate topic.
I don't want to give up from Sprint Layout because I feel most comfortable with it.
On the other hand; I did detailed research on the Internet to see and compare with other softwares as well.
I haven't manage to find proper solution; easy to use layout software as the Sprint Layout is... and at the same time to have option to generate proper "pick and place" fabrication files.
I checked with dozen known softwares skimly to see how is gonna be, alas; I see it is the "problem" at most of those softwares too.

[MDfanatic]

If you learn how to use EasyEDA in conjuction with LCSC and JLCPCB you will be amazed about how easy it is to design and order a fabricated PCB.
I designed my first board in Sprint layout (after I tried Eagle, KiCad etc etc) and trust me when I tell you that I'm not going back to any fo these, even if you paid me.

The only real struggle about EasyEDA is the transition from Sprint. Once you learn the interface and understand what each thing does, you will be designing boards one after another without even breaking a sweat about BOMs, pick'n'place files etc.
You will be ordering boards and components with just a few clicks (well..kind of!) and most importantly, cheap.

I think this topic alone (designing & fabricating PCBs) deserves a separate topic.

Although the cost might be prohibitive for one board if you just want to test, it will cost pretty much the same like a ready-made PCB from Newhobby for example.
I design with 1206 so it can be somewhat manageable to solder by hand and test first before I decide to order a batch of fabricated PCBs.

Although I would't design this for myself as I'm more of a PI guy, it would be an interesting crash-course to learn a bit about the inner workings of the VLF IB-TR.
Looks like I'm off to a new project

[ivconic]

If you learn how to use EasyEDA in conjuction with LCSC and JLCPCB you will be amazed about how easy it is to design and order a fabricated PCB.
I designed my first board in Sprint layout (after I tried Eagle, KiCad etc etc) and trust me when I tell you that I'm not going back to any fo these, even if you paid me.

The only real struggle about EasyEDA is the transition from Sprint. Once you learn the interface and understand what each thing does, you will be designing boards one after another without even breaking a sweat about BOMs, pick'n'place files etc.
You will be ordering boards and components with just a few clicks (well..kind of!) and most importantly, cheap.

I think this topic alone (designing & fabricating PCBs) deserves a separate topic.

Although the cost might be prohibitive for one board if you just want to test, it will cost pretty much the same like a ready-made PCB from Newhobby for example.
I design with 1206 so it can be somewhat manageable to solder by hand and test first before I decide to order a batch of fabricated PCBs.

Although I would't design this for myself as I'm more of a PI guy, it would be an interesting crash-course to learn a bit about the inner workings of the VLF.
Looks like I'm off to a new project

I installed it for the xx'th time now.
Each time I install it; I get disgusted after few minutes and then I uninstall it.
And each time I make some mistake, this time I picked semi-online install and I regret it, because it takes a looong time to locate some components!
On the other hand I wonder if I can download and install all the (JLPcb available) component libraries and have those offline.
So I installed it again and tried to wire up simple opamp. Where is the negative rail supply symbol??? I can't find it!?
Opamp symbol is just awfull! It simply demotivates me to continue...
What... where.. why... hundreds of questions!
Again I am disgusted... I will uninstall it again!

[ivconic]

Guess what?
Why don't you make simplest possible video tutorial of how to draw simple circuit, few opamps, their supply pins and generally finish the schematic.
It can be simplest and meaningless schematic, just few opamps and dual power supply with battery source.
I guess 10 miutes of such video will suffice to get the feeling.
Problem with existing Youtube "lessons" is in impracticality od approach.
People talk too much and bore half the video with their empty sentences, and then quickly throw a bunch of features on what and how...
1000 times I tried to keep my nerve and watch such a tutorial... in the end I always got very annoyed by the stupidity of the tutorial concept and had to rewind and pause 100 times for the simplest action.
Instead of an exaggerated story, you just briefly and clearly show how to draw a simple schematic and how to connect it to the power supply, and that's it.
In addition to Srpint Layout, I also use Proteus, which is pure gold as far as I am concerned.
But I didn't even try to see how it would be used for pcb production.
I am using it only for simulations.

[MDfanatic]

The online editor is more than enough for what you want to do, there is no need to download anything.
Although the SPICE simulator needs improvement, it does what it is supposed to.

--

I wanted to make a Youtube channel with the exact type of content, just pure video tutorials with annotations only.
No annoying conversation, unnecessary information or anything else other than the topic involved.

Looks like I must start that channel anytime now

[MDfanatic]

..

[ivconic]

[ivconic]

In the meantime, perusing the massive editions from online archive; I came across RadioTechnika from 2015 in which there is an extensive text on the subject of detectors and in the text several smaller projects as well as a couple of interesting ones.
I have extracted only the pages related to that article from the large PDF.
Unfortunately the original PDF isn't any better... but it's good enough to see what it's all about.
I extracted the pages individually from the PDF and tried to improve their quality a little.

The Silver Star 5 project is interesting, which is essentially the same as previously published, but with the difference
that it is a 2box detector and a slightly different pcb.
I started to "pass" JPG one by one through OCR and then translated from Hungarian to English with the help of a translator.
Unfortunately, the quality of the original is poor, so OCR is unable to recognize everything adequately.

The good news is that what we need here is a schematic and pcb design that is usable enough.
In the pile of text, I still haven't found an accurate description of how to make coils.
It would be good if a colleagues from Hungary take a look at the PDF and recognized where it was explained about making coils.
And to give us only the basic specifications here.

[ivconic]

Silver Star 5 files:

[ivconic]

I translated some of the pages, I think from page 12 to 15... or so: