Final working prototype: the device is to be put on bikes to remind car drivers of safety distances. The arrow is folded and deployed through a pulley-belt system, and the LEDs light up, forming a moving pathway towards the left

Pulley-belt system

Illustration of the device's use on a real bike

CAD model of the Torque transmitter

CAD Model of the interior of the arrow

CAD Model of the main box (where the servomotor and PCB will be placed)

CAD Model of the upper part of the box

CAD model representing the servomotor and accounting for the PCB space occupation