Popsicle Stick Switch

A momentary contact Single Pole Single Throw (S.P.S.T.) switch that is based on a Popsicle Stick. It is easy to build and the builder learns how a switch works. Read more »

Dodecahedron Speaker for Desktop 3D Printers

At normal listening distances, an array of twelve speakers arranged on the faces of a dodecahedron is a very good approximation of a point sound source, and the sound waves it produces are very close to perfectly spherical. A dodecahedron speaker can be a useful tool in acoustics research, and... Read more »

Star Trails

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  • 12/18/2012 @ 11:04 pm

Star trails are the paths left by stars as seen from the earth. As the earth spins, the stars appear to move and circle in the sky. To capture the star trails you need a camera, a tripod and an automated trigger for your camera. The Arduino, a relay and... Read more »

BEAM Solar Chariots

BEAM robot building techniques allow you to build fun and simple little robots with lots of room for stylizing. BEAM robots can move anywhere from a fraction of an inch to a couple of feet, depending on how big their capacitors are. You can also use batteries. For these two... Read more »

Solar Buzzing Beetle

In these instructions, I teach you how to make a vibrating little cute buzzing humming beetle robot. This is great for beginners because of the simple circuit and low parts cost. Read more »