8x8 LED Matrix

Roy Carlson

I was able to pick up 4 8x8 LED Dual Color LED Matrix blocks on eBay.· The only problem is they didn't come with instructions on how to wire them up.

They have two sets of 12 pins on opposite sides and the following writting on the one edge:TOM-1088DGC-B along with a stamped 33R.

The leds came with 4 chips· MC14094BCP which are to be used to add additional pin outputs to control the leds.

What I want to do with these leds is create a larger version of the Robolympics Medal display for a gift and set it up to either display a scrolling message or something like the Magic 8 Ball example I have seen for the Robolympics.

Does anyone have an idea on how to wire these up to an SX28AC/DP-G?· Can I use the 4 MC14094s or should I use some other output pin diriver?

I am new to electonics but love this site and the Basic Stamp.· I have several of the books that I am using to learn how to use these chips and programs for my model railroad hobby and overall fun/learning.· I use to program in basic and Dbase in the 80s and can work out most of the basic code but am not as familar with using registers and pin variables along with the shift registers, and other commands.· I am learning though and having a great time in the process.

Well, any ideas will be greatly appreciated.

Thanks,

Roy

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Roy Carlson

904-536-7405
roy-kathycarlson@msn.com

Bean

They are most likely similar to these http://www.sparkfun.com/commerce/product_info.php?products_id=682

Bean.

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·

Roy Carlson

Thanks - that sure does look like to pinout that I saw for the part but was unreadable.· At least I can follow this pinout example and test the sequence.

Now for the harder part - how do I program these for a moving display?

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Roy Carlson

904-536-7405
roy-kathycarlson@msn.com

T&E Engineer

If you look at your Ebay receipt, it probably came from Sure Electronics in China. I have ordered on Ebay a few times and get 10 of the 8x8 LED Matrix Modules for under $20 including shipping charges. However, I don't remember seeing the 4 IC chip package with 4 LED Matrix Modules but the numbering system DEG-1088... on the modules are similar and should have the same pins outs as used in my designs.

I have been using these for sometime now and have some great projects. Here are some of them with datasheets if you read into the postings and see the attachements.

http://forums.parallax.com/showthread.php?p=670557

http://forums.parallax.com/showthread.php?p=649643

http://forums.parallax.com/showthread.php?p=649643

http://forums.parallax.com/showthread.php?p=561515

I have a few other LED Matrix projects if you do a search on my name you will find them. Currently I am working with an 8x40 display using 5 of those modules and A6821 serial chips to the SX chip (SX-28) but not going well - I'll get it. I am also working on another RGB version of a large 8x8 LED matrix and controller board from SparkFun. Really cool with 7 colors (your RG LED matrix will give you 3 - being red, green and yellow). Let me know if you have any questions. I love this stuff (LED Matrixes)!

http://www.sparkfun.com/commerce/product_info.php?products_id=760

http://forums.parallax.com/showthread.php?p=681188

I have attached some general design stuff that works for me and the documentation for your displays (20mA) each LED.






Post Edited (T&E Engineer) : 10/22/2007 11:40:05 AM GMT