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Smart Sensor Layout: 4 passive infrared sensors focused out north, south, east and west allow the software to respond to eight sectors. When the participant approaches the piece the passive infrared sensors instructs software to move the arm toward the participant, while an active infrared sensor at the tip, causes the arm to pull away from the participant. This creates a software attraction-repulsion loop.

The passive infrared sensors, which face toward the floor, are mounted underneath the wooden structure that houses the motors. They see a range of 7-9 feet and notice a change in infrared light. Here the participant would be seen in the (SW) Southwest and (W) West sectors.

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