For some reason, our research into similar projects didn't yield the warning that the pressure sensors we're using are extremely finicky and should not be used for any kind of precise or spacial measurement until after we had ordered twenty four of them.
Many miniature tables and sensor contact prototypes later, we discovered that clothes buttons were the secret ingredient in the tabletop to sensor interface. I think this is because:
- The buttons are machine made and extremely uniform in height. less than a millimeter difference in height had huge effects on sensor readings with earlier types of sensor contacts.
- The diameter of the buttons matches the contact area of the pressure sensor, so it's easy to center on the sensor.
- the beveled edge of the button focuses the pressure into a smaller area.
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| A failure |
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| A graveyard |
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Great job!
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