The feet platform is a very imporatant part, as the direct tangible interface for users to control. Its accuracy strongly related the ball movement on the physical sheets.

The reason why they are strongly related because the adxl345 (accelerometer sensor) is horizontal inserted into the bottom part the feet playform surface, in order to get the accurate data of users’ feet movement.

After a series of testing, I chose the 360 degree ball head to make the movement smmoth, and easy to use for the users, and finally use the velcro to secure.



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