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Riding bike in the narrow sidewalks that easy to cause the accident happens. The biker is unable to obtain the information about other bikers who choose the left or right side of the way. The power of LED by converting the kinetic energy into electrical energy. When using the brake, LED show up and lights up. At the same time,the turn signal provides the information to other bikers and let bicycle slowdown.
Tatung University
Taipei, Taiwan