The kit I brought from MakerFarm includes the Printrboard as electronic to control your 3d printer:
This board, developed for the Printrbot project, has the following features:
- Atmel AT90USB1286 microcontroller (can run the most famous firmwares like Marlin or Sprinter and manages the USB communication to the PC);
- 4 Allegro A4982 stepper drivers (3 axes + the extruder);
- MOSFET outputs for extruder, heatbed and an optional fan;
- input for 2 thermistors (extruder and heatbed);
- input for 4 endstops;
- SD memory card slot.
The board has to be mounted, using screws and spacers, on the MDF holder:
Then the holder is connected, with clamps, to the 3d printer frame: