Functions: RAMPS connects a Mega with the powerful MEGA platform and has plenty of room for expansion.The modular design includes plug-in step-by-step drivers and electronic extruder control in a MEGA shield for easy service, replacement part, update-ability and expansion.In addition, multiple expansion cards can be added to the system as long as the main RAMPS board is held on top of the battery. ATmega2 560 as central microcontroller development board itself has 54 groups of digital I/O input/output terminals (14 groups make PWM outputs), 16 sets simulation that the input side, group 4 UART (hardware serial ports), using the 16MHZ glass oscillator.With the boot charger, download the program directly via USB without having to pass on another External writer. Supply part of the optional USB power or as an external power via the AC to DC adapter and the battery. The IDE development interface is based on open source principles, allows you to download free for use in projects, school teaching, motor control, interactive works. The A4988 controller is a carrier board or breakout board for the DMOS A4988 microstep controller. 8 of AllegRO with translator and overcurrent protection from Pololu;
Specifications:
Ramps 1.4 Size: 9.1 x 5.9 cm/3.58 x 2.32 inches.
Mega R3 2560 Size: 10.8 x 5.5 cm / 4.25 x 2.16 inches.
A4988 Colour: Green
A4988 Quantity: 5 pieces

Package includes:
1 x RAMPS 1.4 Board
1 x Mega 2560 R3 Board
5 x A4988 welded drivers
5 x Heatsinks
1 x USB cable.
19 x Sweaters