One is RFID - the researchers visualised the surrounding radio waves using an RFID card and an LED. Pretty cool really.
You can grab some RFID kit from MindKits here
Immaterials: the ghost in the field from timo on Vimeo.
The next one comes from MIT where they have built an autonomous indoor craft that can avoid obstacles, map out a room and fly around. Pretty damn cool seeing the results of its laser scanner in real time appearing on the computer screen.
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