Washers Projects

Marble Adding Machine

Marble Adding Machine

Computers add binary numbers constantly, but we never see how. This elegant machine does the math using glass marbles. I started building marble track machines years ago using Lego. I...

Posted by Matthias Wandel

Categories: Electronics, Woodworking | No Comments


Double Pendulum

Double Pendulum

Devices that demonstrate true chaotic behavior (in a strict mathematical sense) are rare. Even rarer are chaotic devices that are easy enough for the typical maker to build at home...

Posted by William Gurstelle

Categories: Science | No Comments


Rok-Bak Chair

Rok-Bak Chair

Like origami, single-sheet plywood projects transform a standard plane into countless 3D objects. Generations of designers have worked within this form, laying out cleverly fitted pieces that make furniture and...

Posted by Larry Cotton

Categories: Furniture, Woodworking, Workshop | No Comments


Earthquake Detector

Earthquake Detector

An earthquake detector can be a useful home safety device because it alerts you to a quake some seconds before it happens. During an earthquake two kinds of waves are...

Posted by Andrea

Categories: Electronics, Workshop | No Comments