Tacit is a wrist-mounted device that uses sonar to measure the distance to objects and provide users with a 'view' of their surroundings through haptic feedback. It consists of four ultrasonic range finding sensors connected to a microcontroller that calculates the distance to objects by reading how long it takes for the ultrasonic pulses to return to the device. The distances are then translated into force feedback on the back of the user's wrist through servo motors, with the force of the pre...
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