I am driving a common anode RGB LED using a 15mA constant current LED driver. What really confuses me, is that only the blue light works when plugged in. The red and green ones seem to be dead. Whenever the lead for Red or Green is plugged in, the voltage across either would drop from ~5V to ~0V. I haven't written any code yet, and need help in debugging the LED behavior.
Any input would be appreciated!
The red and green lights are still functional, as I can light them up by tuning a dc power supply. However, they wouldn't light up when connected to the constant current driver.