7-seg specification?

[Clive]

I've got some old 7-segment LED displays I want to use. There idents on the
side read:

IEE8322R
8430
F

The main thing I want to do is confirm if they are common cathode or anode.
I suspect they are CC.

Thanks very much.

 

[Peter Bennett]

On Fri, 24 Oct 2003 20:06:40 +0100, "Clive"
<cochapmanNOTTHIS@hotmail.com> wrote:

I've got some old 7-segment LED displays I want to use. There idents on the
side read:

IEE8322R
8430
F

The main thing I want to do is confirm if they are common cathode or anode.
I suspect they are CC.

Thanks very much.

You can easily determine the pinout and polarity with the aid of a
power supply and resistor (and a couple of clip leads). Connect one
pin of the display to the negative terminal of the supply, and a
resistor to the positive terminal (360 ohms or so for 5 volts). Touch
the resistor to each other pin to see what, if anything, lights.
Ground each pin in turn, and repeat....



--
Peter Bennett VE7CEI
GPS and NMEA info and programs: http://vancouver-webpages.com/peter/index.html
Newsgroup new user info: http://vancouver-webpages.com/nnq

 

[Clive]

"Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message
news:LOemb.331$Fk5.743747@newsfep1-win.server.ntli.net...

I've got some old 7-segment LED displays I want to use. There idents on
the
side read:

IEE8322R
8430
F

The main thing I want to do is confirm if they are common cathode or
anode.
I suspect they are CC.

Thanks very much.

Further to the above, the displays came from Farnell Components in the UK,

part no. 103-778.

Thanks

 

[Graham W]

Clive wrote:

"Clive" <cochapmanNOTTHIS@hotmail.com> wrote in message
news:LOemb.331$Fk5.743747@newsfep1-win.server.ntli.net...
I've got some old 7-segment LED displays I want to use. There idents
on the side read:

IEE8322R
8430
F

The main thing I want to do is confirm if they are common cathode or
anode. I suspect they are CC.

Further to the above, the displays came from Farnell Components in
the UK, part no. 103-778.

Page 400 of my Farnell Catalogue (1988/89) lists them as CC as
you expected. 103-777 is CA. The pinout is there, too.


--
Graham W http://www.gcw.org.uk/ XP1800+ Page added, Graphics Tutorial
WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex
Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.