Mega 2560 R3 + 1pcs RAMPS 1.4 Controller + 4pcs A4988 Stepper Driver Module for 3D Printer kit Reprap MendelPrusa Free Shipping

3D Printer Controller RAMPS 1.4
 
RepRap  Mega Pololu Shield, or RAMPS for short. It is designed to fit the entire electronics needed for a RepRap in one small package for low cost. RAMPS interfaces an Ard Mega with the powerful Ard MEGA platform and has plenty room for expansion. The modular design includes plug in stepper drivers and extruder control electronics on an Ard MEGA shield for easy service, part replacement, upgrade-ability and expansion. Additionally, a number of Ard expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack.
Version 1.4 uses surface mount capacitors and resistors to further cover edge issue cases.
 
 Mega 2560 control board:

the board is an ATmega2560 as core microcontroller development board itself has 54 groups digital I / O input / output terminal (14 groups do PWM outputs), 16 sets of simulation than the input side, group 4 UARTs (hardware serial ports), using the 16 MHz crystal oscillator. With the bootloader, download the program directly via USB without having to go through other external writer. Supply part of the optional USB power, or as an external power using the AC-to-DC adapter and battery. Development IDE interface is based on open-source principles, allows you to free download for use in project work, school teaching, motor control, interactive works.
Microcontroller