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The K'NEX Computer

Mechanical Computing: Thinking with Balls

The Present and Future of Ball Computing

Rumor has it that the K'NEX calculator was dissassembled for parts years ago.

If you're interested in latest in ball-based computers, check out turingtumble.com

For the FUTURE of ball-based computers, email us.

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About the Project

Matt Donahoe and Jeff DeCew built the K'NEX calculator and other logic devices while attending Olin College.

It started as a final project for the Computer Architecture class and became a fun side project. The goal was to create a 4-bit programmable computer, but we settled for a calculator instead.

Olek Lorenc and Doug Ellwanger contributed to the effort.

Ball Theory
Half Adder
Full Adder
4-Bit Adder
Accumulator
Decoder

Posts

Nov 2006 (4)
Dec 2006 (3)
Jan 2007 (4)
Feb 2007 (1)
Mar 2007 (1)
Dec 2020 (1)

Links to devices by others

Turing Tumble
LEGO DigiComp II
Wood & Marble Adder
K'NEX Adding Machine
LEGO Logic Gates