The SEIL (Safe Enjoy Interact Light) backpack employs LED lights to display traffic signals through a detachable wireless controller. Designed to work in 2 modes: Driving Mode (left/right turn, brake, cruse, emergency signal) and Emotion Mode (variety of emoticons to choose from). The acceleration sensor detects speed and turns on stop signal automatically. A highly blogged about invention... still brilliant.
leemyungsu.com
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