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The Plasma Speaker
This is so cool!! How loud does it get? And what is the sound quality and frequency response like?
NFC Door Lock with the Qduino Mini (under $100)
Beambox: NEXT - the tower that glows to your commands
Supercapacitor Programmable Attiny LED flashlight
How To Fix A Broken iPod Charging Cord
Buck Converter (DC-DC)
High Voltage Spark Gap Tiki Torch
How to hide your files inside a picture
Sound Responsive Circuit