Shadow Lamp Moves Delibrately Slowly

Inspired by the famous lava lamp, [Mojoptix] wanted to build a creation of his own with a similarly organic, changing lighting effect. However, rather than flowing heated wax, he created a lamp with pseudo-random effects his own way. 

The lamp itself is built around a shadow-puppet concept, using a pair of rotating apetures that [Mojoptix] 3D printed. The apetures turn, one in front of the other, and are lit from behind by an IKEA LED light. As the apetures rotate, they present a slowly varying path for the light from the LED, which is projected onto a paper screen placed in in front of the assembly. To generate the long-period rotation, the rotating assembly is turned by the minute hand of a common clock movement. It’s a great way to get a slow-rotating motor and gearbox setup on the cheap, as long as your torque requirements are absolutely miniscule.

It’s a neat way to produce a slowly-varying lighting effect; we’ve featured other discussions on the topic before, too. Video after the break.

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Shadow Buttons

This art installation uses buttons made of light. A projector fills up the walls and ceiling of a room while a webcam monitors the pattern for changes. When the luminosity of a given area changes due to a shadow, a midi event is triggered. The software that controls the system is written in C# and uses the Emgu CV library to handle the image processing. In the video after the break you can see that creating shadows with your hands prompts changes in the image as well as the sound.

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The Bulbdial Clock Comes To Life

bulbdial

Evil Mad Scientist Laboratories has built the bulbdial clock, an idea originated by Ironic Sans.  It’s basically a high definition indoor sundial. The LEDs arranged in a circle shine a light on the peg in the middle casting a shadow, just like a sundial. There are 3 colors of rings, allowing for hour, minute, and second shadows. This isn’t the first time that Ironic Sans has seen ideas come to reality. There were the pre pixelated reality show clothes and the sneaky histogram hidden message system. While it is a cute idea, it isn’t really new. People have been patenting this idea for a while.

Scratch Built Air Muscles

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We first talked about air muscles in 2005 while lusting after Shadow Robotic’s dexterous hand. The pneumatic devices are known for being lightweight and compliant. They’re designed to be used in robot arms and legs. [jelengar] stumbled across this guide to building your own air muscles. We’re not exactly sure what the original source is since it reads like a machine translation. The core is a piece of silicone tubing used in aquariums. It’s sealed at one end with a bolt. Braided electrical sheathing is slid over the tube and secured using multiple wraps of 24gauge wire. They say to test it using 20psi, but there’s no mention of what the limits are.