Reprap Arduino Mega Pololu Shield or RAMPS for short. 

Full details of this open source hardware design can be found on the Reprap Wiki here:http://reprap.org/wiki/RAMPS_1.4

The 1.4 version is the latest version and incorporates the use of surface mount electronic components.

The product comes as a kitset containing the bare PCB and all the components. You will need to solder on a variety of surfacemount 0805 components, through hole components, screw terminals and header strips.

This is ideal for a training tool for electronics assembly.

If you are looking for a ready to use RAMPS board then look at http://www.makershop.co.nz/RAMPS1.4

You will also need an Arduino Mega 2560 or equivalent clone, the stepper driver modules and a power supply and you will have all the electronics necessary to drive a 3D printer.

The shield provides for:

Sockets for up to 5 Pololu style stepper drive modules. X, Y, and Z axes and 2 extruders.

3 channels of temperature sensing using 100k thermistors (not included) for heated bed, and 2 extruders

3 channels of MOSFET switched output for controlling extruder heating, hot bed heating and cooling fan speed.

Includes Heat sink for the heated bed MOSFET.

This product is supplied as a kitset that requires assembly.

A temperature controlled soldering iron with a fine tip and solder will be required.