I have been working with a simple forcé sensitive resistor, i did a circuit (wheatstone bridge) with 2 220 ohms resistors, 1 4.7k ohm and the forcé sensor. I measure the resulted voltage with a multimeter and it worked well, but in the moment that i read analog data with the Arduino IDE, it does not read the voltage well.
I think that is because the impedance, but i don't know what to do.
- read the "how to use this forum" (you obviously didn't).
- follow the instructions on how to post a question (info you provided is insufficient).
- hope someone understands what you're trying to do and can give you suggestions on how to handle your project
Force Sensitive Resistors (FSR) are usually part of a resistor voltage divider along with a fixed resistor. That way the output is always positive with respect to ground. A Wheatstone bridge needs a differential ADC input as the output is not ground referenced.