Washers

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 and are interesting and beautiful. But one device nicely fits the bill: the double pendulum. A double pendulum consists of a bar swinging from a […]

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Pole-Mounted Aerial Photography Rig

Pole-Mounted Aerial Photography Rig

Sometimes nothing is as important as perspective. My goal in photography is often to find a view no one else has found, to be able to see things from unusual and insightful vantage points. The most practical way to obtain the elusive aerial perspective is by attaching a camera to a mast. While not trivial, […]

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Rok-Bak Chair

Rok-Bak Chair

Make a chair that’s comfortable, looks good, reclines, disassembles for compactness and portability, and can be made from just a single sheet of plywood.

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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 emitted from the centre: a small wave and a dangerous wave. The small wave is faster, so it is the first sign of the event […]

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