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PICList Thread
'[OT] 7 Segment LED'
1997\09\10@033154 by Jacques Vrey

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Hi to all

I was wondering if any of you out there might be able to help.
Some time ago I bought a stack of surplus 7 segment LED's. I'm
wanting to use some in a few PIC projects and such. I have no problem
with most of them but I've got some TIL+311 and have absolutely no
idea how to hook them up. So does any of you out there have a
diagram/datasheet or info for this baby??? If so, could you please
send me a copy (legible ascii art is fine). Thanks.


Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
spam_OUTjvreyTakeThisOuTspamit.new.iscorltd.co.za

1997\09\10@045315 by Jacques Vrey

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{Quote hidden}

Hi there..again

In response..
That was the first thing I tried and all I managed to locate was the
dp's.
This 7seg has a small chip in it that appears to do some decoding as
each segment actually consists of four individual LED's as such:

+--\/----\/--+   +------------+
|            | 14|0          0|1
|  o o o o   |   |            |
|  o     o   | 13|0          0|2
|  o     o   |   |      T     |
|  o o o o   | 12|0     I    0|3
|  o     o   |   |      L     |
|  o     o   |   |      3    0|4
|o o o o o o |   |      1     |
|            | 10|0     1    0|5
|   +---+    |   |            |
|   |IC |    |   |            |
|   |   |    |   |            |
|   +---+    |  8|0          0|7
+-----/\-----+   +------------+

Maybe this will shed some light on the problem.
Thanks anyway.
Regards
Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
.....jvreyKILLspamspam.....it.new.iscorltd.co.za

1997\09\10@045315 by Jacques Vrey

flavicon
face
{Quote hidden}

Hi there..again

In response..
That was the first thing I tried and all I managed to locate was the
dp's.
This 7seg has a small chip in it that appears to do some decoding as
each segment actually consists of four individual LED's as such:

+--\/----\/--+   +------------+
|            | 14|0          0|1
|  o o o o   |   |            |
|  o     o   | 13|0          0|2
|  o     o   |   |      T     |
|  o o o o   | 12|0     I    0|3
|  o     o   |   |      L     |
|  o     o   |   |      3    0|4
|o o o o o o |   |      1     |
|            | 10|0     1    0|5
|   +---+    |   |            |
|   |IC |    |   |            |
|   |   |    |   |            |
|   +---+    |  8|0          0|7
+-----/\-----+   +------------+

Maybe this will shed some light on the problem.
Thanks anyway.
Regards
Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
@spam@jvreyKILLspamspamit.new.iscorltd.co.za

1997\09\10@051642 by Michael Coop (pjm)

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Boom !  (Well almost .)

The TIL-311 is a combined hex decoder / latch display driver.

Jacques - I have sent you an email 1.7MB with the product data sheets...

Regards
MC

-----Original Message-----
From:   Jacques Vrey [SMTP:KILLspamjvreyKILLspamspamIT.NEW.ISCORLTD.CO.ZA]
Sent:   Wednesday, September 10, 1997 4:31 PM
To:     RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU
Subject:        Re: [OT] 7 Segment LED

>
> Have you tried putting one of them in a breadboard, and using a 3V supply
> and a 200R resistor to check out the pins. Connect a random pin to ground
> then connect each pin in turn through the resistor to +3V.
>
> These are the possible outcomes.

1997\09\10@052053 by Jacques Vrey

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> Boom !  (Well almost .)
>
> The TIL-311 is a combined hex decoder / latch display driver.
>
> Jacques - I have sent you an email 1.7MB with the product data sheets...
>
> Regards
> MC
>
> -----Original Message-----
> From:   Jacques Vrey [SMTP:spamBeGonejvreyspamBeGonespamIT.NEW.ISCORLTD.CO.ZA]
> Sent:   Wednesday, September 10, 1997 4:31 PM
> To:     TakeThisOuTPICLISTEraseMEspamspam_OUTMITVMA.MIT.EDU
> Subject:        Re: [OT] 7 Segment LED
>
>

Muchly obliged.

Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
RemoveMEjvreyspamTakeThisOuTit.new.iscorltd.co.za

1997\09\10@055502 by nvdw

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> +--\/----\/--+   +------------+
> |            | 14|0          0|1
> |  o o o o   |   |            |
> |  o     o   | 13|0          0|2
> |  o     o   |   |      T     |
> |  o o o o   | 12|0     I    0|3
> |  o     o   |   |      L     |
> |  o     o   |   |      3    0|4
> |o o o o o o |   |      1     |
> |            | 10|0     1    0|5
> |   +---+    |   |            |
> |   |IC |    |   |            |
> |   |   |    |   |            |
> |   +---+    |  8|0          0|7
> +-----/\-----+   +------------+
>
> Maybe this will shed some light on the problem.

Similar to some HP displays I *had*, should be
BCD encoding + GND + VCC + CS :
Pin 7 - GND
Pin 14 - VCC
1-5 probably digital....

1997\09\10@101434 by Larry Payne

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part 0 74 bytes
Complete data on the TIL311 is available at http://www.ti.com.

cheers,
-larry-

1997\09\10@110931 by Martin R. Green

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If I remember correctly (and I might not) the TIL311 is a smart LED, with a
4 character addressable latch.  I think these devices were actually 15
segment devices, allowing display of the complete ASCII set.  The logic
circuits are 5V TTL.  I will check at home to see if I still have info on
these useful, but way expensive devices.


CIAO - Martin R. Green
elimarEraseMEspam.....bigfoot.com

----------
From:   Jacques Vrey[SMTP:EraseMEjvreyspamIT.NEW.ISCORLTD.CO.ZA]
Sent:   Wednesday, September 10, 1997 4:30 AM
To:     RemoveMEPICLISTEraseMEspamEraseMEmitvma.mit.edu
Subject:        Re: [OT] 7 Segment LED

{Quote hidden}

Connect
> +ve through resistor to pin and probe for cathode.
>
> Common cathode, gnd connected to cathode - lots of segments light up in
turn
> (bingo) start writing down pin allocations.
>
> Common anode, gnd connected to anode - no segments light up. Connect +ve
> through resistor to pin and start writing down segmemnts.
>
> Common anode, gnd connected to segment - only one segment lights up.
Connect
> +ve to pin which lights segments and start writing down pin allocations.
>
> There may be some pins which are not connected, or which are bridged
> together. If you have a meter in series with the 3V supply it's easy to
see
{Quote hidden}

Hi there..again

In response..
That was the first thing I tried and all I managed to locate was the
dp's.
This 7seg has a small chip in it that appears to do some decoding as
each segment actually consists of four individual LED's as such:

+--\/----\/--+   +------------+
|            | 14|0          0|1
|  o o o o   |   |            |
|  o     o   | 13|0          0|2
|  o     o   |   |      T     |
|  o o o o   | 12|0     I    0|3
|  o     o   |   |      L     |
|  o     o   |   |      3    0|4
|o o o o o o |   |      1     |
|            | 10|0     1    0|5
|   +---+    |   |            |
|   |IC |    |   |            |
|   |   |    |   |            |
|   +---+    |  8|0          0|7
+-----/\-----+   +------------+

Maybe this will shed some light on the problem.
Thanks anyway.
Regards
Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
EraseMEjvreyspamspamspamBeGoneit.new.iscorltd.co.za

1997\09\11@021218 by Jacques Vrey

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face
> Jacques,
>
> Complete data on the TIL311 is available at http://www.ti.com.
>
> cheers,
> -larry-
>
>

Thanks very much, I found the datasheet in pdf there.
Thanks to everyone for the help.
Oddly enough I was looking for exactly this type of display some time
back for a PC POST (Power on self test) Card - not knowing that I
already had some. The project never came off the groung so maybe I'll
pursue it now.

Thanks.

Regards
Jacques Vrey
Iscor Steel Profile Products
Newcastle
South Africa
Tel: +27 (0)3431 48759
RemoveMEjvreyKILLspamspamit.new.iscorltd.co.za

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