Force Sensitive Resistor 0.5"

Sensors Force & Weight
1

hi

i have the Force Sensitive Resistor 0.5"

i would like to find a way to convert the voltage reading to newton

thank you

George

2

Hi George.

There really isn’t a conversion so you’d need to apply a known force, get a reading, then apply a larger known force and take a second reading.

If you graph your results, you should end up with a line and by finding the slope of that line you can then write an equation to convert voltage to newtons.

3

It’s worth pointing out that these are pretty nonlinear on the low end of their range.

[datasheet](https://cdn.sparkfun.com/assets/8/a/1/2/0/2010-10-26-DataSheet-FSR402-Layout2.pdf)

4

Hi

thank you

you mean e graph voltage vs waht quantity ??

5

You want to measure Newtons, correct?

You’d graph output voltage against applied force in Newtons. Find the slope of that line to come up with your conversion equation and then write a bit of code to plug in voltage to the equation and it will spit out force in Newtons.

As brow stated, these are not very linear at their low end so your accuracy might not be great depending on how you calculate slope. If you’re looking for high accuracy, a load cell and load cell amplifier are what you’re probably going to want to use.