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Greetings Group,

My friend Karol sent me a very interesting package from Poland recently. The most exciting item is a Russian electro-luminescent display that was used in Soviet tanks! It is a multi-segment display - 16 segments I believe. He included the datasheet with some handwritten translations. The problem is that there is no pinout data. I have the equipment to produce the HF sine wave to drive the display, but I'm not sure how to connect it as I haven't worked with EL displays before. I have uploaded the datasheet and two photos of the display to "Files > Other readout technologies". Any assistance would be greatly appreciated!

Thanks,
Mike

Hi.
First, excuse me for my English.
This indicator is IEL-0-VI. I should say, they`re rather rare, I have only
three.
The smaller version, IEL-0-IV, is commoner.

This EL-s are driven with 400- ~ Hz AC. The amplitude shouldn`t exceed 220V,
as in your "datasheet", but I used them at nearly 300V, and nothing bad
happened. My friend experimented with such IEL-s, and found, that the best
frequency is ~1000Hz, sine wave. I used a wire from the coil of my test
converter on 555 (many kHz) and it worked fine, changed a colour to blue :).
"Datasheet" is taken from a very well known ref.book, I can try to find it,
do you need?

Also, this one isn`t similar to mine. I have very strange-looking EL-s.
Probably you`ve hever seen such model of displaying before. There are 8
segments, disposed very unusual.
The common pin in my indicators is 1. I think, you should just connect one
wire to the same pin and move the another round. When you see, that only one
segment is lit - you found a common pin.
If two - you attached to both segment pins, and the current is lower, than
it might be.
Don`t be afraid, you won`t break the indicator.

But be ready to see very dimmed light. Probably, this EL-s become degraded
with time...

Best regards,
Dmitry.

--- In NEONIXIE-L@..., ??????? ?????× <dvdianov@...> wrote:

Don't be afraid, you won't break the indicator.

But be ready to see very dimmed light. Probably, this EL-s become degraded
with time...

Those are exactly the strengths and weaknesses of EL displays; they're practically unbreakable except if moisture intrudes or they receive extreme overvoltage, and they dim rapidly in the first few thousand hours of use. However, they can continue to operate dimly for many years.

Their durability was what led them to be used in the Apollo program space capsules (and obviously their short usable lifespan would not be an issue in capsules that would only be used for at most a little over a week).

Did the Russian space program also use EL readouts?

A.J.

--- In NEONIXIE-L@..., ??????? ?????× <dvdianov@...> wrote:

Also, this one isn`t similar to mine. I have very strange-looking EL-s.
Probably you`ve hever seen such model of displaying before. There are 8
segments, disposed very unusual.
The common pin in my indicators is 1. I think, you should just connect one
wire to the same pin and move the another round. When you see, that only one
segment is lit - you found a common pin.
If two - you attached to both segment pins, and the current is lower, than
it might be.
Don`t be afraid, you won`t break the indicator.

But be ready to see very dimmed light. Probably, this EL-s become degraded
with time...

Dmitry,

Thank you for your detailed reply. Your English is quite good and with your help I was able to make my display work! I used a 1kHz sine wave at 190v (the best I could make) and connected one wire to pin one and moved the other one as you instructed. It turns out my display has 19 segments and only two unused pins. I also received another .pdf of data from Karol which might include your strange 8 segment display. I created a new folder "Files > Other readout technologies > Russian Electro Luminescent" and posted the .pdf and a photo of my display with all segments lit. I will post the pin connection data soon for anyone else fortunate enough to find one of these. It is really nice with a standard 16 segment "union jack" plus an overscore and two "commas" that were probably used to make the Cyrillic "D". Now I have to decide what to make with it!

Mike