| View previous topic :: View next topic |
| Author |
Message |
Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
|
 Posted: Sun Jul 13, 2008 5:04 pm Post subject: Old LED segmented displays... |
 |
|
Just re-found these in one of my boxes 
Might they be of any value? They they are all in great condition:
4 of the white/clean ones, my favorites Gold pins. One has a mnfg defect, missing some of the bubble... Does not inhibit use, I dont think.
3 of the slender red 5 character, nice looking.
1 of the pink 3 char, different segments from the rest.
1 of the strange wide-legged 5 segment ones... They legs are NOT bent out of shape, it was mnfg this way!!
Would anybody know the pinout of these, I'd love to use them in something!! |
|
| Back to top |
|
 |
chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
|
| Posted: Mon Jul 14, 2008 12:18 am Post subject: |
|
|
Sure, lots of people collect old LED displays. The 5-character ones, for instance, were used in the Melcor SC-535 scientific calculator. (See below.)
- CMW
 |
|
| Back to top |
|
|
Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
|
| Posted: Mon Jul 14, 2008 12:39 am Post subject: |
|
|
| Cool!! I was thinking of using the 5-digits ones in a 5x3 matrix, to display something over USB... Maybe computer related data I found a pinout spec, and I can see through them enough to ID the common cathode and figure out the rest |
|
| Back to top |
|
|
wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
|
| Posted: Fri Jul 25, 2008 3:17 am Post subject: |
|
|
Here's another usage: Interior of an hp 41
The display chips are mounted in an angle of about 30 degrees, funny |
|
| Back to top |
|
|
chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
|
| Posted: Fri Jul 25, 2008 9:23 am Post subject: |
|
|
I don't believe that's an HP-41... The '41(C) had an alphanumeric LCD display. Looks more like the interior of an HP-35.
- CMW |
|
| Back to top |
|
|
wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
|
| Posted: Fri Jul 25, 2008 9:27 am Post subject: |
|
|
| chip68 wrote: | I don't believe that's an HP-41... The '41(C) had an alphanumeric LCD display. Looks more like the interior of an HP-35.
- CMW |
Hmpf, right, How did I think about a 41?
Of course it's a HP-35:-) |
|
| Back to top |
|
|
Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
|
| Posted: Fri Jul 25, 2008 9:39 pm Post subject: |
|
|
| That is a cool looking circuit board |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
| Posted: Sat Jul 26, 2008 4:47 am Post subject: |
|
|
| Some soviet 7-segment LED's. Tiny ones are of type ALS339A. |
|
| Back to top |
|
|
donutty
Joined: 16 Feb 2008
Posts: 1122
|
| Posted: Sat Jul 26, 2008 5:19 am Post subject: |
|
|
Good 'ol HP - was all that gold really necessary for a calculator?  |
|
| Back to top |
|
|
Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
|
| Posted: Sat Jul 26, 2008 6:49 am Post subject: |
|
|
Slightly used soviet 9-digit 7-segment LED display ALS318A. Common cathode, red light. There was 4 modification produced:
ALS318A, ALS318V - full 9 digits
ALS318B, ALS318G - leftmost digit has only segments A, C, F and G connected |
|
| Back to top |
|
|
CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
|
|
| Back to top |
|
|
JAC
Joined: 24 Jul 2005
Posts: 3469
|
| Posted: Sat Jul 26, 2008 4:35 pm Post subject: |
|
|
| CPUShack wrote: | | soviet stuff always looks particularly cool |
Yeah, the cerramic ones are nice.
Of the bubble led displays, I prefer the alphanumeric types. More versatile! |
|
| Back to top |
|
|
isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
|
| Posted: Sun Jul 27, 2008 5:36 am Post subject: |
|
|
| In the HP board the large white Mostek chip is a CTC made also by AMI, I'm not able to read the markings on the small white chip |
|
| Back to top |
|
|
chip68
Joined: 19 Oct 2004
Posts: 1024
Location: Central Pennsylvania
|
| Posted: Sun Jul 27, 2008 8:48 am Post subject: |
|
|
| isa-d wrote: | | I'm not able to read the markings on the small white chip |
MK6020 Arithmetic/register unit. The three metal cans are ROMs.
- CMW |
|
| Back to top |
|
|
wepwawet
Joined: 18 Mar 2004
Posts: 3019
Location: Seligenstadt - Germany
|
| Posted: Sun Jul 27, 2008 9:53 am Post subject: |
|
|
| chip68 wrote: | | isa-d wrote: | | I'm not able to read the markings on the small white chip |
MK6020 Arithmetic/register unit. The three metal cans are ROMs.
- CMW |
... later (eg trhe hp-45) replaced my CDIP16 chips
http://www.hpmuseum.org/45intern.jpg |
|
| Back to top |
|
|
|
![[ Hidden ]](https://cdn.cpu-world.com/forum/templates/CPUWorld/images/lang_english/icon_email.gif "[ Hidden ]"){kind=icon}
