This is a hand showing the colours used in the brain maps: 1-5: thumb (red); index (yellow); middle (green); ring (blue) and little finger (purple). Disclaimer: AAAS and EurekAlert! are not ...

[rog8811] sent in this really cool hack where he used the optics sled from a PS3 as a foundation for a 7 color hand held laser projector. Combining a green laser, a blue ray laser, and a red laser ...