Arduino Motor/Stepper/Servo Shield SHD-MStepper

Arduino is a great starting point for electronics, and with a motor shield it can also be a nice tidy platform for robotics and mechatronics. Here is a design for a full-featured motor shield that will be able to power many simple to medium-complexity projects.

Features: 
2 connections for 5V 'hobby' servos connected to the Arduino's high-resolution dedicated timer - no jitter! 

Up to 4 bi-directional DC motors with individual 8-bit speed selection (so, about 0.5% resolution) 

Up to 2 stepper motors (unipolar or bipolar) with single coil, double coil, interleaved or micro-stepping. 

4 H-Bridges: L293D chipset provides 0.6A per bridge (1.2A peak) with thermal shutdown protection, 4.5V to12V 

Pull down resistors keep motors disabled during power-up 

Big terminal block connectors to easily hook up wires (10-22AWG) and power 

Arduino reset button brought up top

2-pin terminal block to connect external power, for seperate logic/motor supplies 

Tested compatible with Mega, Diecimila, & Duemilanove

Dimensions(assembled): 69mm x 53mm x 14.3mm (2.7in x 2.1in x 0.6in)