The Tacit haptic wrist rangefinder from Steve Hoefer can bring you an awesome ultrasonic experience. The DIY device will allow you guide your way through the darkest of places, just like a bat does it. Tying the super intuitive rangefinder on your wrist, you can walk through strange places closing your eyes with no fear of hitting any objects, walls or anything like that. As you get closer to any hard object, for example a wall, the servos will vibrate and change your route.
Simply, the rangefinder identifies the objects in front of it and warns the user. The Tacit is designed in a way that it exerts great pressure when you get closer to the object. It allows you recognize hard objects while walking in dark. As a whole, the Tacit appears to be a better accessory to help you walk freely without ending up with a broken nose.
Its designer initially meant to develop the Tacit haptic system as a headband with vibration motors. The idea, however, went wrong as most of obstacles normally sit below the head level. Moreover, it could have been an insane experience to get your skull often vibrated with the motors.
Later, Hoefer found the wrist as the apt position for the Tacit haptic rangefinder. It helps users glide through strange locations extending the hand to check whether there is any obstacle in front. According to Hoefer, the hand is more useful and manageable for the rangefinder. As well, its placement on the back of the wrist put the fingers free.