Mark,

When I saw your request, I thought of what Andy suggested.

I can provide you with code for driving the LEDs.  You could do it with a
16C61 OTP ($6.15 each in single quantities from Digi-Key), four transistors
and seven (or 8 if you want to use the decimal points) resistors.

Myke
>Yes,
>
>National Semiconductors MM5450N 34 segment LED driver chip (7seg+dp x 4
>= 32, leaves 2 for a colon or other indicators)
>
>These chips are available blobbed onto 4 digit display modules from
>III-V systems, either 4x0.3" with 2 external indicators or 4x0.5" with
>colon.
>
>Maxim, Harris and Nat. Semi. also do a range of serial in, 8 digit
>multiplexed out driver chips, if you want 8 digits (or 64 bargraph
>elements).
>
>Andy (the other one)
>
>>----------
>>From:  Mark A. Corio[SMTP:Mcorio@AOL.COM]
>>Sent:  30 August 1996 14:39
>>To:    Multiple recipients of list PICLIST
>>Subject:       4 digits.
>>
>>Hi all,
>>
>>Does anyone know of a 7-segment LED driver that is serial loaded?  I
>>need to
>>drive 4 digits from a PIC and don t want to use a lot of pins?  Any
>>other way
>>to do this?  The cheaper the better (of course).
>>Thanks.
>>
>>Mark A. Corio
>>Rochester MicroSystems, Inc.
>>200 Buell Road, Suite 9
>>Rochester, NY  14624
>>Tel:  (716) 328-5850 --- Fax:  (716) 328-1144
>>http://www.frontiernet.net/~rmi/
>>
>>***** Designing Electronics For Research & Industry *****
>>
>
>

Do you ever feel like an XT Clone caught in the Pentium Pro Zone?