12v RGB Leds - Using GPIO on Duex

  • I was following this link on RGB lights.
    DC42 mentions that the GPIO ports can be used.

    My RGB LEDs have a common positive and then neutrals for the colours.
    I have changed the V_Fan select jumper to 12V and tested using a fan output, all works.

    My question is
    Can I connect the negative wires for the individual colours to the GPIO pins OR do I need something between the pin and the LED strip, and will I be able to dim each of the channels on the GPIO outputs?

    Thanks in Advance,


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