Looks like the HDSP-2490: http://www.decadecounter.com/vta/articleview.php?item=9
Datasheet: https://mkmakerspace.co.uk/wp-content/uploads/2017/07/HDSP-2490.pdf These are shift register displays, you clock in column data on a common clock. Similar to the HDSP-2010 and relatives. Quite expensive when new, still very desirable today. Don't let the smoke out :P Thanks, Jonathan On Wed, Nov 21, 2018 at 12:36 PM Curious Marc via cctalk < cctalk@classiccmp.org> wrote: > Try to look up HDSP-2450. These are 5x7 alphanumeric displays with shift > register drivers included. Yours might be an earlier version of that, or > just a commercial temp version of that (the HDSPs are extended temp > -55/85C). Maybe the internal part used in the HP9825 or HP 9830 displays, > then later commercially sold as the HDSP 2xxx series. I can scan the HDSP > data sheet if you can’t find it online. Maybe this will help: > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=2ahUKEwirg4e0_-XeAhWHd98KHVa5AD8QFjAEegQIJhAC&url=http%3A%2F%2Felectron-pv.com%2FPDFs%2FLED%2FHDSP-2xxx%2520AppNote.pdf&usg=AOvVaw1JF1llgVbDdAbcK8UMBie9 > > If you don’t need them I’ll take them :-D > > Marc > > > > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of " > cctalk@classiccmp.org" <cctalk@classiccmp.org> > Reply-To: devin davison <lyokob...@gmail.com>, "cctalk@classiccmp.org" < > cctalk@classiccmp.org> > Date: Wednesday, November 21, 2018 at 7:53 AM > To: "cctalk@classiccmp.org" <cctalk@classiccmp.org> > Subject: Odd Hp leds in dip package > > > > Hello. Encountered a couple odd parts in the pile today, not sure if they > > are anything special. Hp branded dip packages with gold leads. They appear > > to be leds in 4 grid patterns on the face. Im curious what they are out of, > > most likely an old hp computer or calculator. > > > > Part number on the back is hp5033592-101 > > > > i could not find any information online about them. If they are of use to > > someone with a hp conputer let me know. If not im trying to find a > > datasheet and use them in a project. > > > > Pictures : > > > > https://i.postimg.cc/dtJTGZfm/2018-11-21-10-48-34.jpg > > > > https://i.postimg.cc/pL6hNGLq/2018-11-21-10-49-19.jpg > > > > https://i.postimg.cc/C1Nw054S/2018-11-21-10-50-37.jpg > > > >