RAMPS 1.4: RepRap Shield, or RAMPS for short. It's designed to fit all the electronics needed for a RepRap at a low cost. RAMPS connects an Arduino to the powerful Arduino platform and has plenty of space for expansion.<br />The module includes plug-in stepper motor drivers and extrusion electronics on a single Arduino Mega shield for easy service, part replacement, upgrade options, and expansion. Additionally, several Arduino expansion boards can be added to the system as long as the main RAMPS board is the 1.4 version, which uses capacitors and is designed to further cover edge cases.<br /><br />2560:<br />Operating voltage: 5V<br />Input voltage (recommended): 7-12V<br />Input voltage (limits): 6-20V<br />Digital I/O pins: 54 (14 of which provide PWM output)<br />Analog input pins: 16<br />Current per I/O pin: 40mA<br />Current for 3.3V pins: 50mA<br />Flash memory: 256KB, with 4KB used by the bootloader<br />SRAM: 8KB<br />Color: as shown<br />Material: PCB<br />Size: 15x7x2cm<br /><br />Package contents:<br />1 x RAMPS 1.4 Control Board<br />1 x R3 Upgraded Motherboard<br />5 x A4988 (red)<br />5 x Heat Sinks<br />1 x USB data cable<br /><br />Only the above package contents are included. Other products are not included.<br />Note: Lighting photography and different screens may cause the color of the object in the image to differ slightly from the actual color. Allowed tolerance is +/- 1-3 cm.