Digistump Forums

The Digispark => Digispark Projects => Topic started by: sparr on August 20, 2012, 09:21:02 am

Title: 8x8 LED Matrix shield
Post by: sparr on August 20, 2012, 09:21:02 am

http://i.imgur.com/CUbFk.png

This shield would use a typical 2mm-pitch 8x8 LED array and two shift registers. It would be controlled by two pins, and the rows would be multiplexed.

The LED array footprint doesn't quite fit on the published shield size. In particular the pads for the legs would touch the edges of the shield. Since the LED array is larger anyway, I see no harm in increasing the shield size a tiny bit to make it fit.

Title: 8x8 LED Matrix shield
Post by: sparr on August 20, 2012, 07:55:30 pm

http://i.imgur.com/fSRrO.png

this version uses a single (incorrectly and incompletely wired, for now) MAX7219, which does 8 rows and 8 columns all by itself. I think this shield is a lot more viable with this IC.

Title: 8x8 LED Matrix shield
Post by: sparr on September 13, 2012, 07:12:23 pm

http://www.youtube.com/watch?v=3rYnWPY71sg

http://www.flickr.com/photos/sparr0/7984157041/in/photostream

success!

Title: 8x8 LED Matrix shield
Post by: airship on December 31, 2012, 05:00:49 pm

Will you be selling these?

Title: 8x8 LED Matrix shield
Post by: digistump on January 01, 2013, 07:28:59 pm

Digistump and Sparr might partner up to offer these once things slow down a bit.

Title: 8x8 LED Matrix shield
Post by: sparr on January 11, 2013, 02:26:15 pm

More to come on that front soon! I\'ve got to solder my digisparks and put this on top of one for a much prettier demo.

Title: Re: 8x8 LED Matrix shield
Post by: sparr on January 27, 2013, 02:42:00 pm

Here it is, on top of a real digispark. I'm very happy with it! I need to work on the library code a bit (which will be general purpose MAX72XX code) and talk to Erik about selling the kit or doing it myself.


http://www.youtube.com/watch?v=Y9pVjUVQS6Q

Title: Re: 8x8 LED Matrix shield
Post by: flyhigh42 on February 08, 2013, 01:28:19 pm

Wow! That is really cool! I would love to try this at home if you make the kit available. Looks fun fun!

Title: Re: 8x8 LED Matrix shield
Post by: airship on February 08, 2013, 02:07:34 pm

Put me on the WANT! list, too!

Title: Re: 8x8 LED Matrix shield
Post by: defragster on January 19, 2014, 01:44:51 pm

Any progress or updates on the "general purpose MAX72XX code"

This post is the only one I see on this topic: MAX7221 and LED Display Drivers

Title: Re: 8x8 LED Matrix shield
Post by: krummrey on March 14, 2014, 10:19:09 am

Put me down for the shield. Looks great.