Engadget’s Guide to 3D Printing

This past summer when we were putting together our Ultimate Guide to 3D Printing we sought to test a representative sample of available consumer-class 3D printers. Given the dynamic nature of the market, we were sure many new printers would start popping up. And that’s definitely what’s happening. So it’s cool to see Endgadget has come out with its own 3D printer buyer’s guide: The Shape of Things to Come.

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Optical Tremolo: Extended Play

With this Optical Tremolo Box you are hearing are patterns of light, created by a spinning disk translated into rapid electrical fluctuations to produce a warbling audio effect. Audio enters the circuit via the input jack, passes through the variable resistor — the light-sensitive photocell — and outputs to the amplifier, creating the effect known as tremolo.

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Lovely Lego Ball Clock

[youtube=http://www.youtube.com/watch?v=4S2DSteBLDY] Jason Allemann, who created these Lego mazes last year, built this beautiful and elegant Lego ball clock. The video shows how the rail system works with one ball being hauled up the chain every minute, then tipping the balance once enough balls have accumulated. [via Brothers Brick]

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