Hello,
I have built a prototype of the XY + pressure pad described in this topic: http://arduino.cc/forum/index.php/topic,83887.0.html .
I am using 4 Interlink FSR sensors (the round ones with 1/2 inch diameter).
The four sensors do not show the same curve for resistance as a function of pressure. Hence I cannot achieve reliable calculations (the position on the pad is calculated according the pressure measured on each sensor).
Should I try to make the curves more consistent among sensors by electronic means (how then ?) or should I replace all the FSR with load cells ?
Thank you for helping.