Arduino mood lighting

This instructable will show you who to build a rgb lighting system with an arduino. You can also control it with an ipod/iphone/ipad using touchOSC. In my previous instructable I showed how to control one rgb led in this you can control heaps with a single chip the ULN2003A.

Step 1 Parts

You will need

Arduino
ULN2003A ic or equivilent
common cathode RGB LED's(- + - -)
jumper wires
breadboard or perfboard
Resistors based on your led(I used one per channel)
Cable for linking RGB LED's around your home(optional)
 

Comments

[johnnysoko]

This is a beginner question, but if you were to make this without the breadboard, how would you mount the ULN2003A to the Aurduino?

[sapc]

ill send a pic later its night here

[sapc]

it's hard to mount it withoud a breadboard or perfboard, if u have a protosheild u could solder it onto that to make it more compact.

[ralnraln]

what does the final product look like / do? Post a vid! or a picture series of it in action!!

[sapc]

ill post a video later, i destroyed this model so ill have to build it again

[sapc]

also i dont have the telephone cable anymore that runs to the other module so it will just be the one on the breadboard

[d77uk]

Just wondering what the purpose of the IC is? Can't you just do this with PWM direct from the arduino?

[sapc]

the chip is used for driving heaps of leds for large scale purposes if you aren't using to many led's you can just use the pins straight off.

[hightekrednek2396]

whats the maximum amount of leds you can control with the 1 chip

[sapc]

i am not quite sure but i can control 25 rgb leds without any problems:)

[hightekrednek2396]

thanks