If you plan on a vacation, here is a great project to track the temperature and soil moisture of your Plant using dweet.io and AWS IoT.

Arduino's great, but how in the world do you do two (or more) things at once on separate intervals? You need protothreading!

Use the Leap Motion to control tanks armed with Infrared LEDs and Infrared Sensors to do battle.

Scan and draw ruff sketch of distances ahead just like RADAR using UltraSonic Distance Sensor.

Persistence of vision is an optical illusion, it works on a simple phenomenon how our day to day television works.

A modular home automation system