16x16 tri-color LED Matrix - Real Time Clock

Phase 2 of my 16x16 LED matrix - Real Time Clock. This time it is tri-color and full brightness is designed in. It is designed around a Parallax SX52 micro-controller and DS1302 Real Time Clock. Color is controlled by 4 74HC573 ICs. Anodes are set by 2.4 A P-Channel FETs and Cathodes by ULN2803 ICs. gilmoret@us.saic.com

Category:

Howto & Style

Tags:

• Parallax
• SX52
• DS1302
• tri-color
• /
• bi-color
• 16x16
• LED
• matrix

[tdg8934]

You can see this featured in Jan 09 issue of Nuts and Volts magazine!

[EKARVELAS]

HI

can u send me the schematic and code????

Thanks

[tdg8934]

Check out my first post at the bottom of this page that lists the Parallax forum website link for the schematic and Parallax SX/B code.

[EKARVELAS]

hi

i can't find the link.

can u post it here please???

thanks

[tdg8934]

Go to your browser and paste in:

forumsDOTparallaxDOTcom/forums­/defaultDOTaspx?f=21&m=189908

Just change the 3 DOT to an actual .

[tdg8934]

post your email and I will email it to you.

[EKARVELAS]

HI

as i see this is not a microchip mcu ...im working my project with microchip mcu...and ccsc c ANSI compiler.

Thank anyway

[hottermale]

Wow!! nice!! I'm new to PWM and Multiplexing it would be great if ayone can help me with the circuit or MCU program plz e mail me a_hotter_male at yahoo dot com

[tdg8934]

I used a DS1302 with a 32.768 KHz crystal (mainly because I don't have much experience with I2C but the SX52 does support it). I am almost finished adding some coding and switches to set the time/date without having to program the SX52 with a programer. Here is the link to what I have so far including schematics, etc. forumsDOTparallaxDOTcom/forums­/defaultDOTaspx?f=21&m=189908

[trialex]

Wow.

Tri-colour is nice! Just to make it more complicated, have you thought about PWM-ing between colours?

What are you using for the RTC? I'm using a DS1307 for my larger projects that can use a larger process to read it using SPI, for my low power projects I'm just using a 32.768kHz crystal.

Again, awesome project.