I am working on a project that simply has two sensors(resistance change) in series. I want to use a wheatstone bridge to measure the change in resistance because the wheat stone "linearizes" the readings. But if I have two sensors in series, and I put a wheat stone bridge on each sensor, I would have 4 voltage references since each sensor requires a wheat stone bridge. The problem is that my project has two sensors per finger and one for the thumb, but if I put a wheat stone bridge on every sensor....so... each finger except the thumb has two sensors making 4 voltage references. 4 voltage references times for = 18 voltage references + the two from the thumb. that is 20 voltage references!
Is there any sort of modified wheat stone bridge where I can use one wheat stone bridge to measure the resistance change of two sensors "Independently?" Or any way of decreasing the amount of voltage references points but keeping the readings still "linearized?"
I wouldn't have enough analog pins to read in the voltage change to calculate the resistance change.
Hope that made sense.