Reprap Ramps 1.4 Kit with Mega 2560 r3 + Heatbed MK2B + 12864 LCD Controller + DRV8825 +Mechanical Switch +Cables for 3D Printer 1 set

RepRap needs to accommodate the entire electronics.

Oblique interfaces with the powerful MEGA platform Mega, and have plenty of room for expansion.

On the stepper drives and a MEGA shield extruder control electronics for easy maintenance, replacement parts, upgrades and expansion capabilities , including plug-in modular design.

In addition, some  expansion boards can be added to the system, as long as the main ramp plate is saved to the top of the stack .