Do you want to do some projects with stepper motors such as an auto curtain, a XY Plotter, or a 3D printer? Generally, it's not an easy thing to drive stepper motor(s) with Arduino but with this Stepper Motor Shield, you can easily control 2 stepper motors via just 4 digital I/O’s. This board is compatible with the Arduino UNO R3, and get direct support with Xbee and Xbee form factor Wi-Fi, Bluetooth and RF modules. Easy connection of cables via screwless PC terminals. Each stepper motor has a code switch for adjusting driving modes, to obtain different rotational speeds. The interfaces of the board include extension 6 channel Analog I/O, 10 channel Digital I/O & I2C.
The driver IC used is the most popular A4988 which is widely used in 3D printer and CNC machine. The A4988 is able to control one bipolar stepper motor at up to 2A output current per coil. With one Mega and DFRobot's Mega Expansion Shield, a 3D printer control board can be built so much eaiser.