[simpits-tech] Driving LED displays via a serial line

[Robert Favre]

It's called the mm5451, and yep, it was originally designed to drive 7 
segment displays.  While it's a serial chip in that data is fed to the 
chip in a serial fashion, my code drives it via the parallel port on 
the PC.  If you're in the U.S., Radio Shack used to have it available 
online for about 4 bucks.

Rob


----- Original Message -----
From: Gene Buckle <geneb@deltasoft.com>
Date: Friday, May 24, 2002 1:38 pm
Subject: Re: [simpits-tech] Driving LED displays via a serial line

> Alex, the chip that people are using to drive individual LEDs was 
> originaldesigned to drive 7 segment displays.  You can use this 
> for what you need.
> I don't recall the part number though.  I'm sure Rob Favre knows..
> 
> g.
> 
> 
> On Fri, 24 May 2002, Wiebe, Alex wrote:
> 
> > Anybody doing this? If so, how?
> >
> > I've done some preliminary searches and I can only find chips 
> that require a
> > clock and latch line - which is getting beyond my hardware skills.
> >
> > What would be sweet is a chip (much like the stuff that Ferret 
> Electronics> sells) that takes a simple 2400bps serial input and 
> drives 2 x 7 segment
> > LEDs.
> >
> > I'd like to drive a 4 digit and a 2 digit display for my 
> altimeter (the 4
> > digits for the baro setting, the 2 digits for the thousands of 
> feet). The
> > serial line 'splitter' that I'm using to drive a couple of 
> steppers (one
> > being the altimeter) has 3 spair outputs to drive 3 more serial 
> devices.>
> 
> _______________________________________________
> Simpits-tech mailing list
> Simpits-tech@simpits.org
> http://www.simpits.org/mailman/listinfo/simpits-tech
> To unsubscribe, please see the instructions at the bottom of the 
> above page.  Thanks!
>