I am a newbie to electronics and Arduino an have a problem with the following task. We built this RGB LED boards in class and they all worked fine, but now i can't get them to work anymore. The RGB LED board looks like this:
I connect the boards ground with Arduinos ground and the other 3 pins to pins 9, 10, and 11 of the Arduino. The setup looks like this: http://flickr.com/photo_zoom.gne?id=467069225&size=m
I am using this Arduino sketch: http://todbot.com/arduino/sketches/serial_rgb_led/serial_rgb_led.pde
I am not sure if i am using the breadboard correctly. But using the same setup with a simple LED works just fine (of course i just have use 2 connections then..) When testing the RGB LED board for resistance with a multimeter set to 200 ohm, i get all three colors to light up (not at the same time). So it seems like the RGB LED board is ok. Still i can't get the Arduino board to light up the RGB LED.