R.U.M.B.A Features:

 RUMBA (R.eprap U.niversal M.ega B.oard with A.llegro driver)

Full Details available here: http://www.reprap.org/wiki/RUMBA

* fully integrated all in one solution
  - Arduino 2560-R3 compatible (works with Sprinter, Repetier, Marlin out of the box)
    (easy to change/flash firmware for end user)
  - ATmega16U2 (with enhanced firmware) for high speed USB serial connection (up to 2MBit)
  
* UNIVERSAL POWER: 
  - can be used with 12V-35V for motors / heated bed
  - integrated high precision power regulators for:
    - 12V (FAN/Light/...) 
     and 
    - 5V (ATmega2560/Logic)
  - power input selector for ATmega/logic (stand alone or power from USB)
  
* easy DISPLAY + SD-CARD connector
  - RepRapDiscount SmartController compatible pin header on board

* up to 6 motor drivers with easy micro stepping setup (micro switches)
  - TRIPLE extruder
   or
  - DUAL Z driver and DUAL extruder
   or
  - ...

* 5x temperature ADC connectors
  - e.g. 3x extruder thermistor + 1x heated bed thermistor + 1x chamber thermistor
  
  
* 5x PWM capable power mosfet outputs (3 with voltage selector for MainPower/12V)
  - e.g. 3x (MainPower) extruder heater cartridge/power resistor + 1x (12V) fan + 1x (12V) light
  
* 1x PWM capable power mosfet with extended cooling area for heated bed  
  
* 6x end stop connectors with power supply
  - Xmin/Xmax/Ymin/Ymax/Zmin/Zmax
  - can be used for mechanical, opto, hall, ... end stops

* screw terminals *and* pin header for easy motor connection
  - can be used with existing 4 pin Molex plug on motor cable
  - easy to attach cables without plug
  
* USB connector and pin header
  - pin header is useful when mounting in a small box

* Power and ALL unused pins available on EXP-3 feature connector 
  - +5V and +12V
  - 2x ADC
  - 2x PWM I/O
  - 4x I/O
  - I2C
  
* full JTAG support 
  - JTAG can be used during full operation (no shared pins) 
    (easy to develop/debug new or optimized firmware using Atmel Studio)