Arduino RGB LED Controller

RGB LED Controller made with the Arduino, an ULN2803 chip and 3 PNP transistors. I am using one of the timers in the Arduino for the Multiplexing, making it possible to write code in the main loop without having to worry about refreshing (multiplexing) the LEDs

Check out our blog for more information: http://blog.tkjelectronics.dk/2011/08/arduino-rgb-led-controller/

Category:

Science & Technology

Tags:

• multiplexing
• rgb
• led
• arduino
• uln2803
• rgb led
• timers
• pwm

[MGD320]

Nice setup .....what the music in the end

[mindthomas]

@MGD320 Thank you. The music is Enya - Caribbean Blue

[eddiea6987]

are they pulse width modulating or are they all on? Im assuming PWM i dont think arduino can power that many LEDS?

[mindthomas]

@eddiea6987 I'm using 3 PWM channels, one for each color. The common ground pin of every RGB LED is then connected to the ULN2803 chip, where I can enable or disable power sink.

Then I just multiplex all the LEDs, changing the PWM values when I sink power for the specific LED.

[rho2k9]

appreciate it man! Nice lil tutorial!

[mizokako]

nice, want to try something like that

[MGD320]

@mindthomas  thx

[CODEINGWITHALEX]

hi