In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote: It's finally time to let the cat out of the bag and announce that PJ Allen and myself have been working on some coding for a new LED Display Board from Sure Electronics. It is by far the biggest and best LED board I have ever worked with. A lot of hard work went into figuring out the hardware on this board over the last few weeks and how to even turn on a LED. This new 3mm LED Display board sells for about $36 but they also have a 5mm LED Display board for $70 that I understand the Enable is inverted on the 5mm LED board (that should be the only difference). Our project used the 3mm LED Display board: [url=http://www.sureelectronics.net/goods.php?id=420]http://www.sureelectronics.net/goods.php?id=420[/url] Keep in mind that shipping from Hong Kong was not cheap and was about $25 or so (so I ordered a few boards and shipped one off to PJ Allen for his help in our project). PJ Allen and myself studied the hardware driving the (32) 8x8 Bi-Color LED matrixes and was able to say "Let there be light!" after a couple of weeks. Once we were able to figure out how to display individual and rows/lines of LEDs, it was time for character display and code clean up. PJ Allen did an outstanding job optimizing the code down and we had gone through many revisions from everything from displaying a dot matrix picture design to green background and red text to allowing keypad entry. Neat accomplishments were made with our efforts. However, PJ has decided to take a break for a while and concentrate on other projects. I will continue a while longer to improve the code and provide other options. I'm going to next explore using Hyperterminal to enter in the data into the display. Currently we can save the display text to a 24LC32A (or similar) EEPROM and also enter the display text from a Micro datapad that Bean sells for $3 on his website. The text and color codes (Red, Green and Orange) currently is displayed on a 4x20 serial LCD (which although is simpler to do - hyperterminal or something similar would offer a cheaper project cost). After lots of optimization, it was inevitable that we must move up to an SX48 for more RAM and program space from earlier versions using an SX28. We even can daisy chain the display boards together but require a 50 MHz resonator for more scanning speed. A single board will run fine on a 20 MHz resonator. I just could not wait to show what the neat things we have been working on. More to come from the great LED display board. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=281259 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2008 (http://www.dotNetBB.com)