How do I measure the impact of a finger on a surface ?
I am using a piezo sensor. It is cheap, reliable and easy to interface. Also it does exactly the job it is meant for : it gives an image of the mecanical energy at its surface.
What surface do I use ?
Every experiment I am doing is made on a piece of glass. Approximatively 30cm*20cm.
System overview :
I made a video explaining a little what the system is all about :