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Purchase a proper footswitch unit. You need to decide your specifications: Momentary action or latched. Normally open (NO), normally closed (NC) or changeover. The latter gives you options. Program your microcontroller with a pull-up on the input. Wire your switch from the input to ground so that it pulls low when pressed. You might need to debounce your ...


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you take the difference because the force due to pressure acting on the top surface has direction upwards, while the force on the bottom surface has the opposite direction (same direction as gravity). So the two forces cancel each other. Becauce the $F_{top}= P_{Ext}\cdot A_{top}$ and $F_{bot}= P_{Ext}\cdot A_{bot}$ the net force is: $$F_{net}=F_{bot}- F_{...


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