Russian IEL-0-VI 8 segment displays

[dr pepper]

Does anyone have any experience of these displays?
As far as I can tell they are electroluminescent, and are driven from
ac.
I'd like to use one of these and was wondering what sort of voltages
and waveforms i'd need, they are similar in operation to a vfd but
without a heater.

[Terry Kennedy]

Here's what VTA says about them:
http://www.decadecounter.com/vta/articleview.php?item=1122

[John Rehwinkel]

>> Does anyone have any experience of these displays?
>> As far as I can tell they are electroluminescent, and are driven from
>> ac.

You are correct.

>> I'd like to use one of these and was wondering what sort of voltages
>> and waveforms i'd need,

You'll need about 100-300 volts AC. Waveform and frequency don't matter much, but DC won't work. Higher frequencies will make it light bluer. It's really not very critical, they'd probably light just fine on wall current, but you'd really want some sort of current limiting before giving it a try!

I have a few, I'll give 'em a try with some obvious things like one of those battery-powered fluorescent light drivers and a trivial inverter (555 driving a switching transistor connected to a 8Ω:1000Ω transformer as a step-up). I'll also try an ordinary EL inverter with a capacitor to soak up some output, since they don't like to run underloaded.

>> they are similar in operation to a vfd but
>> without a heater.

Not really, VFDs run on lowish (24-60) DC voltage. EL wire, panels, and displays work more like a leaky capacitor, where the leakage reappears as light.

- John

[dr pepper]

Yes I read the VTA article.

Cant find it now but there was something showed up after a quick
google showing the pinouts, is there just a backplane and segment
connections as per an lcd, or is there other volatges req.
And would I need to have any dc bias like on some vfd tubes to ensure
the digits stay off.

It'll be interesting to see what happens JR, let me know what
voltages, connections and resistors you end up with.

[Дмитрий Дианов]

Hello.

As far as I remember, it`s known that such indicators "like" pure sine wave and are recommended to be used at 400 Hz. Maybe that`s only because 400 Hz is a standard power frequency in avionics or so...

But the most of ELI I saw were of VERY dim light. Either they`re not mentioned as any bright in databooks, not so dim! A result of time, I think.

I`m going to see how folks here in Russia powered them and tell you, but feel free to try - I`ve never heard about broken ELI :)

Moreover, I saw ELI with broken glass that still were (partially) functional.

Excuse me for my english,

Dmitry Dianov.

2013/5/3 dr pepper <seaking.h...@gmail.com>

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[dr pepper]

Thanks Dmitry.

My Russian isnt good either.

A sine wave drive isnt so easy on a dc powered device, especially at
200v.
I could use an rc filter to remove a lot of the harmonics from a
square wave signal and produce an approximate sine wave, I dont think
these devices will use lots of current so that should be practical.

I'm still not sure if these devices have a backplane or common or
whatever, might have to sort that out when they arrive.

On 3 May, 09:17, Дмитрий Дианов <dvdia...@gmail.com> wrote:
> Hello.
> As far as I remember, it`s known that such indicators "like" pure sine wave
> and are recommended to be used at 400 Hz. Maybe that`s only because 400 Hz
> is a standard power frequency in avionics or so...
> But the most of ELI I saw were of VERY dim light. Either they`re not
> mentioned as any bright in databooks, not so dim! A result of time, I think.
> I`m going to see how folks here in Russia powered them and tell you, but
> feel free to try - I`ve never heard about broken ELI :)
> Moreover, I saw ELI with broken glass that still were (partially)
> functional.
>
> Excuse me for my english,
> Dmitry Dianov.
>

> 2013/5/3 dr pepper <seaking.helicopt...@gmail.com>

> > For more options, visithttps://groups.google.com/groups/opt_out.- Hide quoted text -
>
> - Show quoted text -