Russian VU. - Page 1
Forum section: electronics / projects

author: neo
author_rank: Super Contributor
timestamp: October 02, 2017, 11:25:06 pm
content: http://www.ebay.com/itm/Lot-of-1-piece-IVLSHU1-11-2-VFD-Level-Display-Tube-New-NOS-Tested/322676590277?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649I got one of those, though i have no clue how to make it work. Anyone read russian?

author: ataradov
author_rank: Super Contributor
timestamp: October 03, 2017, 12:09:10 am
content: The article says it is a copy of FG28SB1, so you may get better luck finding info on that.

author: MasterT
author_rank: Frequent Contributor
timestamp: October 03, 2017, 12:43:27 am
content: http://www.diagram.com.ua/list/sprav/sprav184.shtmlGoogle translate may be helpful to get connections & voltages, nevertheless previous experience with VFD must.

author: neo
author_rank: Super Contributor
timestamp: October 03, 2017, 01:08:48 am
content: Quote from: MasterT on October 03, 2017, 12:43:27 amA regular VFD i can work with, this is not regular. There is a integrated circuit on the glass i think.

author: floobydust
author_rank: Super Contributor
timestamp: October 03, 2017, 07:45:14 am
content: I see pics showing a chip on glass, and the datasheets show it's multiplexed with L/R and perhaps peak/hold. Looks pretty cool, rated to-45C lol.I have had luck giving google translate Russian datasheets.

author: neo
author_rank: Super Contributor
timestamp: October 03, 2017, 01:39:48 pm
content: Quote from: floobydust on October 03, 2017, 07:45:14 amThere is one of the sales page, my only problem is that it would take me days to type out from a picture.

author: schmitt trigger
author_rank: Super Contributor
timestamp: October 03, 2017, 01:53:49 pm
content: The only thing I can understand from the datasheet is, which means Moscow.Anyways, very nice looking device! I hope that you can make it work.

author: ataradov
author_rank: Super Contributor
timestamp: October 03, 2017, 05:34:54 pm
content: The circuit from the eBay listing seems to be complete. It has Uinl and Uinr for left and right input signals. It needs 27 V, 9V and 2.4 V power supplies.The graphs show input voltage vs. the number of elements (bars) lit.

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: October 03, 2017, 05:45:11 pm
content: I am russki-speaking. What would you like to know? Hand-translating three pages is quite boring.Instead, I have found some of the text from the article here:ftp://pti.kpi.ua/pub/electric/http/radio/199911/p46.htmlEncoding is Cyrillic KOI-8R, haven't seen it used for 10+ years.Anyways, google translate churned out this:Quote

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: October 03, 2017, 05:56:23 pm
content: More fromftp://pti.kpi.ua/pub/electric/http/radio/199911/p41.html:Quote

author: floobydust
author_rank: Super Contributor
timestamp: October 03, 2017, 10:58:14 pm
content: I looked into it and it's a really weird 80's part used in cassette decks etc. {cue Top Gun soundtrack}You can translate OCR sections of the datasheets. I'm reposting some pages here.It seems to need a clock and muxed Right/Left (rectified) average and peak signals.Used with K157UD2 (Russian LM301) and K547KP1 (quad CMOS switch) IC's.The odd ball is this part has positive GND, must be PMOS or something. Tough circuit to figure out.

author: floobydust
author_rank: Super Contributor
timestamp: October 03, 2017, 10:59:28 pm
content: last two magazine articlesYou can translate by cropping a column, OCR convert, translate with google button athttp://www.newocr.com

author: neo
author_rank: Super Contributor
timestamp: October 04, 2017, 12:22:02 am
content: What i was wanting, specifically, was to know what U1-4 are, know what the DDs are and to know the voltages. I may need to read through what leo posted more thouroughly though i see nothing on the U1-4 chips.Thank you Leo.

author: ataradov
author_rank: Super Contributor
timestamp: October 04, 2017, 01:12:25 am
content: DD1 is CD4011(A), DD2 is CD4066A. U1-U4 are some sort of AC to DC converters (possibly envelope detectors). The article does not mention specific part numbers, but it will be some sub-assembly, not a simple component. The article mentions that they can be omitted, and the results presented are actually measured without them (authors did not know what they are either?).EDIT: Yes, they are peak detectors:Quote.

author: neo
author_rank: Super Contributor
timestamp: October 04, 2017, 02:51:22 am
content: I just got it, the way the circuit works. At first it looked indecipherable but now i understand it, the nand gates for an oscillator, whose output is used both inverted and non-inverted and then used to select channel. The rest may ultimately serve a purpose though for the the simplest overview it can be seen as trim.Now i just need to hope i didn't break the thing by toying with it, if it is as old an IC as i think then there stands a decent chance i did.