[Laser] Nearing my wits end...

J. Forster jfor at quik.com
Sun Jan 16 22:03:06 EST 2005


Sounds like an old HP display to me. As I remember they were numbered HDSP-????
-John

KD7JYK wrote:

> I would imagine this should be easy to find as it is 35+ year old technology
> used in watches, calculators, junky kids toys...
>
> However a day long search has resulted in nothing, thought I'd ask here...
>
> I am looking for the old miniature seven segment displays.  Round, only a
> fraction of an inch high.  What I need is a display in a roung package no
> more than 5/16" across.  Something in a package such as a passive IR sensor
> package with the display viewable through the window would be the best, but
> something in a modern T13/4 package or anything else will work....  I used
> to see them everywhere in the seventies, tossed a lot of them, some were
> nice open topped transistor looking things with eight pins on the base and a
> clear lens on top to view the charaters.  Usually there was a magnifying
> lens because the charater was so small.
>
> Ring any bells?  Any ideas?
>
> I found an example of what I'm looking for here:
>
> http://www.datamath.org/Display/Display.htm
>
> This link is even better:
>
> http://www.play-hookey.com/digital/experiments/seven_seg_led.html
>
> If you scroll down just a little bit there is an example of a three
> character unit, I'm looking for something like this but single character.
>
> Any help in finding this would be greatly appreciated!!!
>
> Kurt



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