Background
As people are eating in a restaurant, taking a subway, walking on the street, it's likely to find them being engrossed by their shining smartphone screens. No matter in the public or private space, people are always more captivated by digital objects than the world around them.
Using an ultrasonic sensor, the vibrating motor will vibrate when it detects nearby obstacle at the front. According to the arduino code, it vibrates more rapidly when things get closer.
Materials: Arduino, Ultrasonic Distance Sensor, Mini Vibrating Motor, 9v Battery, 3D Printing by Objet Printer.
