1 Wireless LED Display ECE4007-L03 Mekre Mesganaw Mark Reed Paul Simmons Chris White March 12, 2009

2 Project Overview Transmit RSS feeds wirelessly to an LED display which will then display the feeds Fill a market gap for a flexible information display system, serving both business owners and homeowners Estimate development costs at $185,000 and sale price at $1,100

3 Design Goals Scrolling LED matrix display Modular design Bluetooth connectivity Multiple sources –RSS (Really Simple Syndication) feeds –Text files –Time Computer controlled via GUI

4 System Block Diagram

5 Cypress CY3210 Evaluation Kit Cypress CY8C PXI Programmable System-on-Chip Multiple I 2 C interfaces Serial port connectivity 2 KB onboard memory

6 Promi SD-101 Bluetooth Adapter Serial to USB Bluetooth Adapter Up to 30m range Automatic pairing mode Transparent serial connectivity for devices

7 MAX6953 LED Driver Chip 40 pin DIP I 2 C interface 16 chips per bus Four 5x7 grid control ASCII character support

8 Driver Power Considerations 1.33 W max power dissipation 0.6 V driver drop ~2.0 V LED grid drop 3.3 V supply ~537 mW power dissipation

9 LTP 2057AKR LED Display 5 x 7 LED matrix 2 inches by 1.5 inches Red mono-color Common Cathode Row

10 Graphical User Interface Local web browser interface Scroll speed options Display options Time Text file RSS news headlines

11 Software Implementation Computer Side –ASP.net –Packets PSoC Side –C programmed –Memory storage

12 Modularity Eight characters per board Boards connected for variable lengths Eight boards connected to single I 2 C bus

13 Project Schedule Completed Tasks Completed GUI on February 4 th Tested single grid prototype on February 16 th Tested four grid prototype on March 9 th Upcoming Milestones Complete PCB soldering on March 24 th Complete PSoC programming on April 3 rd Complete testing on April 10 th

14 Cost Analysis $ for control module, software and one LED board $ per expansion board Expected profit of $1.1 million over 5 years