Now available from Tronixlabs Australia is this awesome N-Drive shield from Freetronics. Using the N-Drive shield you can directly control up to six separate high-power loads -such as high-intensity LEDs, lamps, motors, and relays.
The Freetronics N-Drive shield incorporates six N-channel MOSFETs, each capable of switching up to 60V DC at 20 Amps.
That's enough to drive massive loads such as 30W and 60W RGB LEDs capable of burning your eyeballs right out of year head!
Each MOSFET is connected to an Arduino pin with PWM capability, so you can vary the power delivered to each load individually.