hello
I'm planning to build a LED array to display graphics, patterns and things like that. One Idea is to build a robot with a LED "face".
I have some experience with the picaxe chips so I was planning on using one of those for this build. I've got my eye on the Picaxe-28X2 module.
I've been reading about the 28X2 chip having bidirectional I/O pins but I can't tell from the Picaxe manual spec how many inputs or outputs it has, or how many of these are bidirectional.
basicly what I'm wondering is: how many possible outputs, that I can use for this project, are there on the Picaxe-28X2?
The standard Picaxe-28X seems to have 17 possible outputs making an 8x8 display, which isn't bad.
for examples of similar projecs check here:
http://www.instructables.com/id/LED-Dot-Matrix-Display/
http://www.nerdkits.com/videos/ledarray2/