Conductive Fabric Pressure Sensor
Thermoelectric USB charger - off grid electricity.
Solar Power Supply V3.0
Audio Delay Module
Find the combination to your master lock!
Small-scale wave-power - free energy from the beach!
MAKE A SPRING-ACTION MORTAR WITH ADJUSTABLE HEIGHT (using a plastic beer jar and discarded stuff)
DJI Groundstation instructions for flying an octocopter on autopilot
Sexy 6 AXIS ROBOTIC ARM
Box with a Music Lock
Drastically Improving the Speed, Life, and Performance of your R/C Helicopter
RFID pet feeder
Altoids USB Battery/Solar charger for iPhone and iPod