2 Digit LED Display

Archiver

I was wondering what i would need to run a two digit numerical LED
display off of a STAMP II. Basically I want to use it as a type of
error code generator for a robot, so I can externally tell what could
be causing problems without having to sift through the code.

As far as i know, I need an LED display, and some sort of IC to drive
it, but I'd like to know what works best, costs least and where I can
find information and datasheets on how to use them.

Thanks,
Chris

Archiver

I am putting together a 3 LED display right now and am using 74hc595 shift
registers. You use one chip per LED but only 3 BS2 lines even if you add 20
digits!
I like all the flexibility these give you. One thing that I did was to
program it so that all the segments were on the one side and DP on the other.
You will understand once you look at the documentation.

www.phanderson.com has all the info in there stamp section on doing this.

Good Luck

Op

Archiver

Hi,
A good way to drive seven segment LED displays from the stamp is with
the MAX7219. This chip will drive up to eight (common cathode) digits and
code is available for stamps. Get the chip at:

http://www.maxim-ic.com

Duncan

Archiver

Could u please put the exact link or your own version of the plans for the
multi-7-seg. LED dislay, because I couldn't find it on www.phanderson.com.

Thanx
Seth

Archiver

Could you post the exact URL? I can't seem to find the site. I am
fimiliar with using the 74HC595s, but any new information still helps.

-Chris