By Oliver Schneider and Anna Macaranas.
Realized during the Sketching Haptics Workshop @ UBC during August 2011.
Our final project is a handheld device simulating the properties of a combination lock. Three red LED lights symbolize a sequence of three sensations needed to unlock the device. When the user begins to move the analog stick, different sensations are felt depending on the direction of motion. When the user wants to 'key in' a particular sensation into the lock sequence, they simply press down the analog stick.
We were inspired by Bianchi et al.'s work at CHI 2011 . We were also interested in learning how to use haptuators and analog sticks.
|Pick up device. Three red LEDs symbolize a locked device||Begin moving analog stick. Enter first key in lock sequence.||Press analog stick inwards. Move to second key in sequence.|
|Press analog stick inwards. Move to last key in sequence.||Case 1: Code is incorrect. Device restarts to default state.||Case 2: Code is correct. Device is unlocked.|
Bianchi et al. demoed a analog dial that gave different haptic sensations. The purpose of haptic feedback is to prevent others from “looking over the shoulder” and finding out your PIN.
We had difficulty encasing the haptuator in material that is sturdy but thin enough to let the haptic feedback go through. We had issues getting the timing of the LEDs right in code due to the nature of Arduino functions.
Future models would use gestures rather than an analog stick. LED lights would be embedded on the device, as opposed to being attached to a breadboard.