This is a neat little device that you can hook to an Arduino micro-controller. It can sense up to 2 meters with very good accuracy . You can get it on amazon for around 12 bucks. Stay tuned for cool projects that include this sensor.
find the code used at http://pastebin.com/UXXwhFFU
this code will only turn a light on when the object is closer than 90 cm and off when father away
Well this server is in creative mode and two of the players gave us permision to biuld in there claim
so overall pretty cool server
A programming tutorial and minecraft tutorial coming Wednesday March 20th
Hey im just working on my social network if you want to help tomorrow email me email@example.com
Me and my gf are in London for today and I will be posting a video later today