Drive up to 8 relays from your Arduino using just 2 I/O pins with this shield. It communicates with your board using I2C, so you can even stack several shields together to drive 16, 24, or more outputs! Includes back-EMF protection and works with a wide range of relays. Perfec...
Arduino Power Shield
What's a project if it's trapped on your desk? Now you can take your Arduino anywhere you wish with the PowerBoost shield! This stackable shield goes onto your Arduino and provides a slim rechargeable power pack, with a built in battery charger as well as DC/DC booster.
This module is a shield of Arduino UNO. It can turn Arduino pins into Makeblock RJ25 ports. You can connect Arduino UNO with Makeblock electronic modules. This shield provides a stable power, so it can drive many servos and motors.