Qvar array

[TKula]

Hi all, 

Would it be possible to have an 8x8 array of capacitive pressure sensors connected to the Qvar pins by an analogue multiplexer.

I would like the qvar to effectively scan across the sensing array. 

[Federica Bossi · Accepted solution]

Hi @TKula ,

Welcome to ST Community!

It should work but you have to handle the settling time during the switching between a capacitive sensor and the other and to handle the limited BW of the Qvar considering the large numers of sensors that you want to connect.
Be sure to have a small delay required for the QVAR sensor to stabilize and accurately measure the capacitance.