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Raspberry Pi Bike Headlight
If you have used a bicycle speedometer, you can guess how hard it is to move your eyes off the road even for a sec to see how fast you are pedaling.
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Eye Stick - Light Cane
Designer Kim Tae-Jin won the Red Dot Award 2012 for the concept of unusual canes for the blind, which is used instead of the hard core of the light beam and miniature ultrasonic sonar.

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