"The Danguinololu v2 is a brand new take on the popular Sanguinololu RepRap controller. It is a fully integrated solution with a completely redesigned layout that used parts based on an availability/functionality/cost trade-off.
The stepper motor drivers are integrated into the board, reducing its overall size and removing the need to purchase the additional four Pololu A4988/A4983 drivers and hence reducing overall cost. Although the modular feature is lost, burnt out or damaged motor drivers are a rare occurrence in this controller, especially since the use of a large (80mm) fan has been implemented in the PCB design and provides more than enough cooling for the motor drivers and FTDI chip.
Also, status indicator LEDs are a prevalent feature of the new board for all motor drivers, extruder, and temperature sensors (in addition to power and FTDI comms), which prove extremely useful when troubleshooting. Plus you get the added cool effect of a dozen flashing LEDs!
The redesigned controller is based on the Sanguinololu v1.3a schematic, hence all firmware that works on the latter will also work on the Danguinololu."