Arc Reactor from Iron Man 2

thingiverse

Create your own Iron Man II Arc Reactor replica using 4 printed pieces, 28 x 5mm white LEDs, and 28 x 0805ish 820 ohm resistors. Low layer height is essential for the coils and core to minimize the 'stairs' effect. Ensure parts are designed for .4mm extrusion width. The diffuser should be made from transparent blue PLA at lowest infill. To fit in the center 4 holes, 4 LEDs need cutting or sanding. Surface mount versions of resistors may prove challenging to solder. Only proceed if you have good soldering skills; otherwise, avoid this project. Uploaded pictures of wiring are available for reference, but wiring details can vary. July 13, 2013 update includes core and coils with wider slits for easier slicing in some software.