LM317+TL431, really?

[Alex Ra]

Funny small program - calculator to get proper R, C for various simple schematics with LM317, TL431, LM317+TL431 etc.
Download link from russian page :
LM317 и LM317T схемы включения, datasheet, характеристики
Download link:
http://led-obzor.ru/pdf/lm317-kalkulator.exe
I just tried it and it works.

Rн = R load
Iн = I load
"н" = "нагрузка" = "Load" in Russian.

 

[mchambin]

This .exe looks like a virus.

 

[metal]

Why do you think it looks like a virus?

 

[Alex Ra]

To "mchambin": where did you get this info?
Are you a programmer?
I am.
I am a top-level sysadmin, worked for banks and world's Top-100 companies.
No virus here.

2 online checks show no virus (one (out of 30+) red alert is nothing, a typical mistake).
VirusTotal
Dr.Web (R) online check
Additionally, my Comodo antivirus shows no virus.
Your info is useless.
Again: Where did you get this?

 

[mchambin]

The provided link to the .exe file lauched weird things on my smartphone, that had no relation whatsoever, looking like scam, then aborted with a message "cannot open some .pdf".

 

[jean-paul]

Then it is clear that this is a virus 😀 This way of reasoning is standard in the EU, except when it it is a real virus of course 🙂

 

[avtech]

Unless your smartphone has Windows installed, it's gonna do weird things.

I sprayed the file with isopropyl and it definitely has no virus now.. 😉

Thanks for the link, Alex!

 

[metal]

OK, here's the unpacked file, it is written using Delphi programming language. I don't think this will change the results of virustotal. I also checked what it does, it doesn't seem to be a virus.. file actual size after unpacking is 1.42 MB, we are changing the topic of this thread, I presume, end of story, I hope.

 

[Mark Johnson]

I downloaded the .exe to a Windows-7 laptop computer and ran three different virus scans upon it: Malwarebytes, SuperAntiSpyware, and Avast. All of them said it was clean.

This was not a phone, it was a laptop.

The O/S was Windows 7, not Android or iOS

 

[mchambin]

Unless your smartphone has Windows installed, it's gonna do weird things.

I did not mention my smartphone runs Android, I cannot even think about a Windoze here.
So, weird things under Android is suspicious.

 

[Alex Ra]

Guys, are you kidding me?!
Brief search gives You the author of calculator - well known in russian DIY electronics.
His name is Nazar Shtybel.
He is from Ukraine, Lvov city.
He is is a team lead in electronic company.
His Linkedin profile
https://ua.linkedin.com/in/nazar-shtybel-05ba0662
His personal web-site:
S-Audio.Systems // Home
The latest version of calculator:
S-Audio.Systems // Some my programs
The attached below - an early version, taken from another russian site:
LM317 калькулятор
Nazar is an author of well-known (controversial) "Nazar regulator" based on LM317, with very high PSRR (100...120 dB):
S-Audio.Systems // "Nazar`s regulator", variants
Discussion here, in russian:
http://www.audio-perfection.com/forum/showthread.php?tid=292
Calm down, nothing to worry about. No viruses. There is no way to build a modern alive virus with the size of 116 kBytes. (Ok, it is possible, but it is a job for top-level programmer, and this virus will not live long).

 

[Alex Ra]

The author of LM calculator, Nazar Shtybel, is a long time member of this diyaudio.com site forum board, from 2009 (as it was expected. I just wonder is there on planet Earth a standalone music lover, an electrician, who is not a member of this community?):
https://www.diyaudio.com/forums/members/nazar_lv.html
See his thread:
Regulator Design v1.3