DIY SPECTROPHOTOMETER

[Charlie] has been making a diy Spectrophotometer, as well as while it is a “shambling mess of information-age technology!” it is still much much better than ours. Focused around an arduino, bits of lego, as well as a flashlight, this innovative gadget rotates a diffraction grating (flake of compact disc) aimed at a picture resistor. …

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THE LASER GUIDED wheelchair

using a scanning laser similar to those used in industrial safety systems, a new wheelchair developed by Sweden’s Luleå university of technology allows those who are visually impaired to drive it without assistance. A motorist is given haptic feedback as a navigation aid, reportedly similar to using a cane. Although something like this is good …

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