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1  Using Arduino / LEDs and Multiplexing / Re: Need help with 24x40 LED Matrix on: February 18, 2013, 11:34:00 am
Thanks guys! That helps a lot, and now my shopping list is a ton cheaper.  smiley-money
2  Using Arduino / LEDs and Multiplexing / Re: Massive LED Matrix on: February 12, 2013, 06:18:31 pm
Thanks for the replies, guys.  smiley-wink
I've decided to stick with the MAX7221 since there seems to be more documentation and libraries for it and since my project is very similar to one by Volpin Props:

I do have a few more questions though; I've gotten together a list of all the components I need to buy to make my matrix, but due to having little experience with electronics, I'd appreciate it if someone could look over it and tell me I've anything I plan on buying is wrong or something.
Here's the list:  -  Arduino Nano v3.0   -   Red LEDs, ~960 of them   -   MAX7221 (15)   -   30K OHM resistors (15)   -   0.1uF capacitor (15)   -   10uF capacitor (15)
These last three components are on the list because of what I read here:
And some ribbon cable so my wiring doesn't look like a rat's nest:
I plan on buying custom circuit boards or etching my own for the MAX7221s.

Anything else I should know before "officially" starting this would be greatly appreciated!
3  Using Arduino / LEDs and Multiplexing / Need help with 24x40 LED Matrix on: January 29, 2013, 08:25:29 pm
Hello everyone!

I'm new to Arduino, I just ordered mine a few days ago, however I'm doing a (pretty ambitious) school project which prominently features a rather large LED matrix.
The project is a replica Zer0 helmet (from Borderlands 2) with a LED matrix in the faceplate to display the character's in game emotes.
I decided to use the Arduino Nano in this project due to it's small size.
After some measuring and extrapolating, I've concluded that the LED matrix I'm including in the helmet's faceplate will contain either a 24 by 40 LED matrix or a 24 by 32 LED matrix (that's 960 or 768 LEDs respectively).
I was thinking of using MAX7221 LED driver's for each grid of 8x8 LEDs.
Due to my lack of experience I have no idea how to go about wiring or coding something like this; so any help, advice or criticisms would be greatly appreciated.

(I should probably add that I took an introductory programming course last year, and that my dad is a computer programmer so he should be able to help me if I get stuck with the coding part of the project.  Also, I'm going to use single color, 5mm, red LEDs.)
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