These are the official Eagle electronics CAD files (schematics and board layout) used in the Ultimaker 3D printer. Included as an XLS is the BOM with several part numbers as exported from Eagle.Older versions of the electronics were published on the RepRap wiki:Documentation of the electronics is also on the RepRap wiki.The electronics contain concepts from RAMPS predecessors, mostly as first seen from Adrian Bowyer's work. The initial version is based on work by jjshortcut. Subsequent improvements by: Siert Wijnia (Ultimaker) and Erik de Bruijn (Ultimaker).The Ultimaker instructions normally come pre-assembled with an Ultimaker. If you use these files to make your own version, please see the documentation linked above at the RepRap wiki.For instructions on how to mount and connect it to the Ultimaker 3D printer: http://wiki.ultimaker.com/Ultimaker_rev.3_assembly:_Mounting_the_electronicsAt the moment of publishing it is the most current version of the Ultimaker electronics.Changes compared to the 1.5.5 and 1.5.4 version are:Marlin firmware compatibility is unaffected by this updated PCB.These electronics are designed to be used in conjunction with the UltiController, which features a click-encoder for easy control, a screen for monitoring and file selection, and an SD-card slot for printing without a computer attached.https://shop.ultimaker.com/en/parts-and-upgrades/ulticontroller-ultipanel.htmlOfficial UltiController files have been released as http://www.thingiverse.com/thing:27039Ultimaker advises official Ultimaker electronics in conjunction official Arduino Mega's.