Date: Tue, 30 Sep 2008 03:48:31 +0000
From: Ethan Dicks <ethan.dicks at usap.gov>
Subject: Re: LED displays (TIL305, TIL308, etc.)
<snip>
I have one or two of a few different types, but no
loose 9368s (only
installed in boards already).
One thought I had for trying to use a reduced-pin-count
MCU-based numeric
display was a 7447-type chip on 4-bits of an I/O port, and a 74145-type
BSD decoder on the other half of the port - up to 10 digits easily, or 9
with simple blanking (write 0 to the '145 and don't hang a digit off of it).
<snip>
-ethan
-----------------------
That's the way it was usually done, although depending on display size (current)
a '145 might not have enough oomph to drive the digits directly without a buffer.
I have a few 9368s if you're desperate; it decodes to hexadecimal (for common
cathode displays), whereas the 7446/7/8 displayed those odd symbols (and
blank for F of course).
m