Technology

Coffee Can Doppler Radar Set

Coffee Can Doppler Radar Set

Radio hacker extraordinaire Greg Charvat is back with this 15-minute video lecture showing off and explaining the measurement of moving objects’ velocities using the low-cost coffee can radar system he and co-workers at MIT developed, in the fall of 2010, for their open courseware initiative. The video begins with a chalk talk describing the operation […]

DIY iPad Augmented Reality Cars

DIY iPad Augmented Reality Cars

Waiting out an unfortunately lengthy shipment, Stockholm area maker Johan von Konow decided to build for his son a working set of augmented reality game pieces for the Cars 2 AppMATes game on his iPad. To achieve a faithful representation of the characters in the game, Johan modified a couple of PEZ dispenser tops approximately […]

iBamboo Passive Acoustic Amplifier

iBamboo Passive Acoustic Amplifier

It’s uncanny how well even the most basic passive acoustic amplifier can improve the sound that emanates from tiny handset speakers. Even though I have yet to experience the pure acoustic awesomeness of the iBamboo from New York area Etsy member Anatoliy Omelchenko, I still find that the design compliments the elegance of the iPhone 4.

Nebulophone With Custom Housing

Nebulophone With Custom Housing

Michael Cochrane of London, the UK, built a nebulophone, a cool synthesizer sold by Bleep Labs. I got my Nebulophone (from the Maker Shed) soldered and working a couple of weeks back, and have since completed a housing for it… I added an amplifier circuit and speaker so I could hear the Nebulophone without headphones. […]

Android Geiger Counter

Android Geiger Counter

Use the camera in your Android smartphone to detect radiation with the Radioactivity Counter app from Rolf-Dieter Klein. Just place a small piece of black tape over the camera lens, calibrate for ambient noise, and you’ll be ready to take readings in no time. The app uses the device’s built-in CMOS sensor to detect primary […]