A friend and I set out to make a trebuchet in two days and $100. Witness the result.
A radio controlled hovercraft I built for physics class.
My very own motion tracking airsoft turret that I built for fun.
A friend and I spent six (four, really) weeks making holograms; provided is a short
write-up along with some media.
The most elaborate project I have worked on to date, this is a method for
figuring out the positions of real-world sound sources in 3D by listening with four microphones.