Tuesday, August 4, 2009

Small LED dot matrix development board

I was very busy for the past two months so this blog just didn't move. As you may know, the LED dot matrix display is my favorite device. I have designed a small development board for testing my led dot matrix related programs.
The schematic is as the following:
LED dot matrix development board Schematic

The PCB is single sided so I can make it at home. Most of the components are SMD to keep small footprint of the board. The PCB size: 58.4mm x 46mm
LED dot matrix development board PCB

Acutally, I made a PCB and installed all components but the board didn't work :p. It was working when I tested the schematic on breadboard (with through hole version of PIC16F887). I think the SMD PIC16F887 may be broken or the PCB is bad but I just don't have time to figure out the problem. I will try new PCB and PIC16F887.

4 comments:

bro said...

sir..
can u help me to design digital chess clock using PIC microcontroller?
do emel me for any feedback...
kapitau0inc@yahoo.com
hope u can help me..
10q..

Juanchi Ghione said...

your blog is soo good! Thaks for everything!!!

tagskie said...

hi.. just dropping by here... have a nice day! http://kantahanan.blogspot.com/

Rolando said...

Nice, I've made a similar project, a small scrolling led sign.

I've used an at89c2051, 4017+transistor dmux

Visit "http://www.eercz.com"