Robots w/Lasers

March 13, 2006

LED Matrix Display project

Feb/March 2006:

My plan is to use a 8×8 led matrix, and make a small game. Maybe pong, or breakout, or something. The cheapest LED matrix I could find (Futurlec’s LEDM88RG sch), for $1.90 each), was actually red and green in each cell, so now I will have 2 bits per pixel of color! (It can be red, green, or orange(both)!). I’m going to use shift registers on the rows & columns (those three IC’s are 74HC164: 8-bit serial in/parallel out), so I don’t need to use a ton of output pins on the microcontroller.

I’m using an ATMega8 by Atmel, which is awesome: 8MHz (can go 16Mhz if I change the crystal), 8KB Flash for program storage, 32 general purpose 8-bit registers, 1KB SRAM, and 0.5KB EEPROM. It has 23 general purpose I/O lines. The best part? It’s only $3.66. The development board was about $16, and the programming cable was $12. (This was all from SparkFun, a pretty cool shop)

March 10th:
Here is a protoboard with some components on it:
Protoboard with some components

It doesn’t have the microcontroller and supporting stuff, because this is the prototype, and all that is on the dev board. Those 6 things at the bottom are buttons…I’m thinking a control scheme like Up/Down/Left/Right, and then A & B. Maybe a ‘start’ button as well…

Filed under: AVR — davr @ 11:27 pm


  1. I converted my boring html page to use wordpress. It’s quite nice.

    Comment by davr — March 14, 2006 @ 12:49 pm

  2. file Source LED Matrix Display project

    Comment by hadi — November 18, 2006 @ 1:20 am

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    Comment by Tom — January 25, 2007 @ 4:48 pm

  4. thanks.

    Comment by mohsin — December 18, 2007 @ 8:18 am

  5. Neato – inspiring.

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