Although we all love to pressure sensor, especially if they’re those extra-clicky pressure sensor that kick your finger back as they activate, sometimes projects call for more discrete methods of user interaction, allowing users to enjoy your project like magic, with the controls hidden away and simple gestures or carefully placed knocks activating various effects. This is when you need awesome discrete Button&Switches such as Thin Film pressure sensor like these, which are little 40x40mm Squares that can identify and measure force between 20g and 10kg. They are made in a similar way to how many Rain or Liquid Sensors are made, measuring the resistance between elements as the conductivity fluctuates, although instead of using liquids as the conducting element, the flexible sandwich PCB stretches, pushing the elements closer together or further apart, resulting in a change in resistance and being identified as pressure.