12v Common Anode RGB LEDs

Forum 2005-2010 (read only) General Frequently-Asked Questions
6

You could use your approach of 12V tied to Vin, then use a multi-transistor driver like a ULN2803 to connect to the cathodes of the LED's.

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The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, light sensor, potentiometers, pushbuttons