Fun experimental idea shared by janth on Instuctables:Quick and direty Sideway Warning system as sideway idea of Personal Photonics funded by the german ministry of education and science. Whenever something comes clother to you which you can’t hear (either because of hearing impairment or just because electrical cars are much more silent than the old one), a vibration on your arm should give you an hint that you might want to look to the side. 5 Vibration motors (actually only three are used (driven by an ULN2803), the other are backup if something goes wrong) are used in connection with three VL53L1X distance sensors. They are controlled with an Wattuino Pro Mini (3,3V), battery powered with an duall AAA battery pack. 3D printed housings snap everything on a wristband.
Due to sunlight and arm movement the system didn’t work that well in real life, but at least its fun to try … // Read more: original article.
