Tell us about yourself!
Make a Japanese Garden Lantern Out of Hypertufa
LED Light Fixture for Aquarium, Grow Light, or Shop
Addendum: since the controller from ilavmodding/ilavapple (and moddiy.com) seems to now be unobtanium, and there seem to be no other true 4-wire PWM controllers (just PWM controllers for 2-wire or 3-eirr fans) the alternative is this diy circuit: http://www.overclockers.com/pwm-fan-controller/ (the module I originally used has a different buffer chip but is essentially the same 555 PWM driver...)
Make a Bicycle Lamp without Battery
Make Your Own Dimmable LED Workshop Lighting!
The pocket grill
Wireless Electricity Transmission (Simple things required to be collected from scrap)