Projects
- 3D Optics
- 9V Battery Snap Do-it-yourself
- Audio Equalizer
- Binary Beads
- Cartesian Diver
- CD Spectrometer
- Circuit Game
- DC Motor
- Electric Train
- Faraday Flashlight
- Homopolar Motor
- Infrared Heart Rate Monitor
- Jeopardy game
- Jumping Jack
- LED Display
- LED Flashlight
- Liquid Crystal Display
- Magic Wand
- Op Amp Oscillator
- Paper Planes
- Smart Lighting
- Solar Cooker
- Speaker
- Vacuum Fluorescent Displays
- Water Filtration
- Wireless Energy Transfer
Speaker
Build a working speaker from paper, wire and a magnet. Connect it to your mp3 player. Instructions for an optional (but not necessary) amplfier included.
Speaker from Betty Lise Anderson on Vimeo.
Slow-motion video of speaker (note this one is driven by a source a little more substantial than a cell phone!) Credit: Clayton Greenbaum