The FSR is made of 2 layers seperated by a spacer. The more one presses, the more of those Active Element dots touch the semiconductor and that makes the resistance go down
What is a Force Sensitive Resistor?
FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost.
FSR's are basically a resistor that changes its resistive value (in ohms Ω) depending on how much its pressed. These sensors are fairly low cost, and easy to use but they're rarely accurate. They also vary some from sensor to sensor perhaps 10%. So basically when you use FSR's you should only expect to get ranges of response. While FSRs can detect weight, they're a bad choice for detecting exactly how many pounds of weight are on them.
However, for most touch-sensitive applications like "has this been squeezed or pushed and about how much" they're a good deal for the money!
How will use the sensor in our project?
We used 4 FSR as one large force sensor that connect to a MP3 player shield.
Please read more on the lu's next post
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