This is a demonstrative video that combines every components used in the Kalma installation.
1. Two photocells detect the speed of the visitor entry
2. Photocells send an input to Arduino board
3. The board is connected to servo motor where is attacked a tube for the breath sound (the speed of the servo motor variates according to the speed of the visitor).
4. The pc, connected to the projector, projects the light of the breath onto the pavement
5. Camera sends information about the movements within the courtyard to the computer
6. The computer detects the position of people within the shot
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