I made this matrix of LEDs a while ago. My goal was to have a display that I could control with an Arduino Microcontroller and program to make animations and play simple games. Here is my version of the classic Pong game.
This device uses an 8-bit shift register and a decade counter.
The decade counter cycles through the rows while the shift register chooses which LEDs in each column to turn on.
I think this device uses about 100mA of current nominally (Arduino and everything)
If you connect it to your computer, you can see your score in the serial monitor of the Arduino IDE.
If you would like to see the source code for this project, download it here:
matrix engine template
Here is a full size schematic of the Arduino shield that I built:
If you have DipTrace, you can view the schematic with the DipTrace schematic editor.
If you have any questions, please post a comment and I'll reply to you as soon as i can!
Thanks for checking out my project! Good luck building it if you choose to do so!