This is a 3D printable 1/2 scale version of the wooden binary adding machine by Matthias Wandel: http://www.sentex.net/~mwandel/

See a short demo of the 3D printed version here: First time glitched on "32", but second time worked as it usually does: http://youtu.be/GhgaMkGWSNI I may make a better video showing how it adds up a series of numbers, up to 63. The machine resets or wraps around 64.

Educational device to see the binary system in action. Watch as binary bits and bytes toggle in physical form. The steel balls will register the sum of all the values being added together.

Read the article on 3Dprint.com http://3dprint.com/92406/3d-printed-binary-adding/

Based on http://woodgears.ca/marbleadd/

Demonstration of the original wooden model: https://www.youtube.com/watch?v=GcDshWmhF4A

Designed for 5/16" steel balls.

Inventory Build List

• 1× Upper Assembly
• 1× Base Assembly (Supports are required - do not let any supports get on top of the exit ramp. You can support the overhang at the top well enough by going next to the ramp.)
• 6× Rocker Switch
• 6× Rocker Post
• 1× Input Slider
• 1× Upper Number Bar
• 1× Result Slider
• 1× Return Pool
• 6× Guard Rails, as needed, the longer drops seem to need them more.

The Upper Number Bar needs to be glued on to hold the Input Slider in the track.