RGB_mk_1.zip
700mA constant current driver for three leds to be PWM'd from a 5v microcontroller. Just add power, and connect your gpio to the input block.
Parts:
-Terminal blocks (WACO style, can find on ebay)
-R1-R3 .75 ohm 1 watt+
-R4-R6 100k ohm .25 watt
-Q1-Q3 MOSFET (IRF640 or similar)
-Q4-Q6 NPN TO-92 Transistor
Based on: http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/ Circuit 5