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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.l2649
I got one of those, though i have no clue how to make it work. Anyone read russian? -
The article says it is a copy of FG28SB1, so you may get better luck finding info on that.
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http://www.diagram.com.ua/list/sprav/sprav184.shtml
Google translate may be helpful to get connections & voltages, nevertheless previous experience with VFD must. -
http://www.diagram.com.ua/list/sprav/sprav184.shtml
Google translate may be helpful to get connections & voltages, nevertheless previous experience with VFD must.
A regular VFD i can work with, this is not regular. There is a integrated circuit on the glass i think. -
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. -
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.
There is one of the sales page, my only problem is that it would take me days to type out from a picture. -
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. -
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. -
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.html
Encoding is Cyrillic KOI-8R, haven't seen it used for 10+ years.
Anyways, google translate churned out this:QuoteVacuum fluorescent indicator ?????1-11 / 2
The journal "Radio", number 11, 1999.
Material prepared by L. Lomakin, Moscow
The subject of this "Reference leaflet" was suggested to us by readers who found discrepancies and inaccuracies in the reference literature on indicators. The editors attempted to cross-check all the available information on the indicators of IWMSH1-11 / 2, held consultations with specialists. We hope that the material published here, together with the results of the experiment with the indicator (see S. Biryukov's article), will help radio amateurs who decided to use such an indicator in their designs.
The scale indicator of the level of the two signals is designed to work in high-quality household sound reinforcement equipment. The indicator panel consists of two lines of 11 elements of green (8) and red (3) glow in each. The signal level is additionally indicated by digitization in units of decibels. Digitization of the switched on indicator shines constantly, and the number of luminous elements in the rulers depends on the level of the monitored signal AF. The device is produced in two versions, differing only in that one scoreboard should be placed horizontally in the apparatus (Figure 1), and in the other - vertically (Fig. 2).
The case of the indicator is glass, flattened, rectangular; conclusions - rigid lamellar tin-plated. To control the work of the indicator, a microcircuit is built into it. Weight - not more than 40 g.
Foreign analogue is FG28SB1.
Pinout indicator: vyv. 1 - cathode heating output; vyv. 2 - digitizing the scoreboard; vyv. 3 - the general; vyv. 4 - channel select signal input; vyv. 5 - input 1; vyv. 6 - control input 1; vyv. 7 - control input 2; vyv. 8 - input 2; vyv. 9 - negative power terminal; vyv. 10 - output of cathode and cathode glow; conductive screening coating on the inside of the cylinder. The number of leads should be counted from left to right (Figure 1) or from bottom to top (figure 2), while keeping the device face-to-face.
Main characteristics
Brightness of luminescence, cd / m2, not less than, anodes-elements
green glow
red glow
250
70
Brightness of luminescence, cd / m2, not less, at the end of the guaranteed operating time for anodes-elements
green glow
red glow
125
35
Contrast,%, not less than 60
Viewing angle, degree, at least 40
Dimensions of the information field, mm 54x17
Number of controllable anode elements 23
Nominal voltage of the cathode, V 2,4
Voltage at the anode-elements, V 27 ... 33
Cathode heating current, mA
limit values
nominal value
140 ... 170
160
Number of inclusions of incandescence, not less than 104
Readiness time after switching on, s, no more than 0,1
Guaranteed operating time, h, not less than 30 000
Working range of ambient temperature, ° ? -45 ... + 40
Main characteristics of the built-in microcircuit
Supply voltage, V -27 ...- 33
Voltage between the cathode and the common wire, V (The difference between the supply voltage of the control chip and the voltage of the cathode - the total output should not be 3 V) -24 ...- 30
The voltage of the channel selection signal (v.4), B, for the level
high, not less than
low, not more than
-1
-9
Voltage at the inputs 1 and 2 of the control, V 0 ...- 8
Leakage current, ?A, not more,
at the input of the switch
by analog inputs
5
10
Limit values ??of parameters
The cathode heating voltage, V 2 ... 2.65
The greatest negative supply voltage of the built-in microcircuit, V -38
The greatest negative voltage between the cathode and the common wire, V -30
The greatest negative voltage at the inputs 1 and 2 of the control, V -14
A typical functional scheme for the inclusion of the indicator IWSHU1-11 / 2 is shown in Fig. 3. The low-voltage voltage source G1 feeds the cathode glow. Anode-grid indicator circuits are powered by a voltage source G3. The clock generator G2 controls the operation of the electronic switches S1 and S2 and the logic elements integrated in the chip indicator.
The designation of the inputs of the high-frequency device: Ikan.sp and IIkan. cp - inputs of the signal of average values ??of the right and left stereo channels; Ikan.pik and IIk.pik - inputs the signal of peak values ??of the right and left stereo channels.
Mount indicator in the equipment is recommended by gluing the balloon to the edges of the cutout in the false panel to fit the size of the board with "Elastosil" glue. The mechanical fastening or fixing on the pins that are soldered on the board is not allowed. The indicator position during operation is arbitrary.
Copyright 1997-2002 OOO Chipinfo 103009, Moscow, POB 914, tel / fax: +7 (095) 105-05-98 -
More from ftp://pti.kpi.ua/pub/electric/http/radio/199911/p41.html:Quote
Node of signal level indication on IWSSH1-11 / 2
The journal "Radio", number 11, 1999.
Author: S. Biryukov, Moscow
In this issue of the magazine, in the "Reference sheet", a fluorescent indicator of the level of the stereo signal IVLShU1-11 / 2, controlled by the built-in microcircuit, is described. Here you will also find information on the scheme for turning on the indicator, how the node works in general, how to set it up, and so on.
The experiments were conducted with a copy of the indicator IVLShU1-11 / 2 (manufactured in December 1987), which was purchased in one of the Moscow stores. When the indicator was turned on, it turned out that it was different from those described in the manuals. First, the current at the control inputs (terminals 6 and 7) had an inflowing direction and a significantly larger value (100 ... 150 ?A). Secondly, all the elements in the scoreboard were green in color, but differed in structure. In both rulers of the scoreboard, the first eight elements, indicating the average level of the signal in the channel (-20 ... 0 dB), consist of each of the three strokes that turn on simultaneously. Each of the last three elements to indicate the peak level (1 ... 5 dB) is a solid luminous field of a square shape. Note that in the foreign analogue of the instrument all elements also have a green color of glow.
One of the practical variants of the scheme for turning on the indicator is shown in Fig. 1. The input low-frequency signals of the right and left channels are fed to the inputs Uin.p and Uin.L. The U1-U4 converters generate DC signals proportional to the average voltage of each channel (U1, U3) and the peak value (U2, U4). Through the switches DD2.1-DD2.4 and emitter followers on transistors VT1, VT2, these signals are fed to the inputs of analog-position indicator converters.
The voltage controlling the inclusion of the elements indicating the middle level is applied to the control input 1 (display 6) of the indicator in the negative with respect to terminals 2 and 3 of the polarity. The voltage for the indication of the peak values ??of the signal is fed to the control input 2 (vyv.7).
The switches DD2.1-DD2.4 open and close in pairs alternately under the influence of two paraphase output signals of the clock generator assembled on the logic elements DD1.1-DD1.4. The generator frequency is about 300 Hz (this value is uncritical), the duty cycle of the signals is close to two.
With a single logic level, the DD2.1 and DD2.2 switches are open at the output of the DD1.3 (0 ...-1 V relative to the common wire), the signals from the outputs of the right channel channel converters U1 and U2 pass to the corresponding inputs of the indicator. At the same time, the input of the selection of the indicator channel (pin 4) receives the zero logic level (-8 ... -9 V relative to the common wire) and the scoreboard corresponding to the right channel is switched on.
The middle-level AF signal illuminates the elements in group 1-8 of the right line of the indicator, starting with the first, and the greater the signal voltage, the more their number turns on. The peak component also illuminates the elements of the 9-11 right ruler in the same way. The switches DD2.3, DD2.4 are closed at this time, and the elements of the left ruler of the indicator are switched off.
As soon as level 1 appears at the output of the DD1.4 element, the left ruler of the indicator turns on and the U3, U4 converters come into operation, the DD2.3, DD2.4 switches open - the left channel is working.
Emitter repeaters serve to reduce the influence of the input current of the analog-position converter on the charging and discharging time of the capacitors of the U1-U4 converters. Zener diode VD1 forms a bias voltage, reliably closes (on the grids) elements of the indicator lines that are not included at one time or another.
From the position of the engine of the trimmer resistor R7, it depends on what is the lowest input voltage the first element of the ruler turns on (the lower or the left one on the scoreboard - it is the first in the group of average values). Similarly, the resistor R8 can change the threshold of inclusion of the ninth element of the ruler (it is the first in the group of peak values).
It should be noted that during the tests of the indicator, the results of which are presented below, the U1-U4 converters were not used. The drivers of trimmer resistors R1-R4 were connected directly to the inputs of DD2.1-DD2.4 switches, and a regulated DC voltage was supplied to the stereo input. You can read about how such transducers work and work in the article of I. Izakson, V. Zaika, P. Kolesnikov and N. Salo "Modern cassette tape recorder" (Radio, 1984, # 10, pp. 33-35) or in the book by Y. Bystrov, A. Gapunov and G. Persiyanov "One Hundred Schemes with Indicators" (Moscow: Radio and Communication, 1990).
In Fig. 2 shows the voltage dependence that must be applied to the control inputs of the indicator for switching on a different number of elements in each line, on the left for the average values, on the right for the peak values ??taken at different positions of the handle of the resistors R7 and R8. It can be seen that the resistance of these resistors strongly affects the position of the initial sections of the curves, on the one hand, and on the other - the voltage of the inclusion of the last element in the groups is fixed at about 5.5 V (for the test specimen). Turning the elements on and off when the signal level changes is fairly smooth.
From the consideration of the curves it is also seen that the type of dependence of the length of the luminous line of elements on the input voltage required for such an indicator-the dependence must be logarithmic-is not maintained for any value of the resistance of the resistor R7. Therefore, the digitization of the scale in decibels, which is available in the indicator, is very conditional and can serve only to estimate the signal level, and not to measure it.
The required ratio of the signals applied to the input of the U1 and U2 converters for the right channel (U3, U4 for the left channel) is set by trimmer resistors R1 and R2 (R3, R4).
If the voltage at the input of the channel selection signal of the indicator HL1 (v. 4) is fixed at the level 0 or -9 V relative to the common wire, the indicator will work as one-channel. In this case, both the generator and the DD2.1-DD2.4 switches become unnecessary.
Calibrate the device, assembled according to the scheme in Fig. 1, as follows. The drivers of trimmer resistors R7 and R8 are set to the maximum resistance position. The inputs Uin.pr and Uin.L are connected to each other and fed to them by a low-frequency sinusoidal signal with an amplitude corresponding to a level of 0 dB. Trimmer resistors R2 and R4 achieve half the brightness of the elements that indicate this level in the "right" and "left" rulers, respectively. Decreasing the voltage of the input signal to the level corresponding to -20 dB, set the slider of the resistor R7 to the position where the first elements of the rulers remain on.
In the same way, the resistors R1 and R3 set the threshold for the inclusion of the last (eleventh) elements of the indicator lines at the signal level +5 dB, and the resistor R8 achieve the inclusion of the "+1 dB" element at the appropriate level of the input signal. -
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.
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last two magazine articles
You can translate by cropping a column, OCR convert, translate with google button at http://www.newocr.com
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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. -
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:QuoteThe U1-U4 converters generate DC signals proportional to the average voltage of each channel (U1, U3) and the peak value (U2, U4).
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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.