# How does a force sensitive resistor work?

## How does a force sensitive resistor work?

How force sensitive resistor can measure pressure/force. The more of the conductive ink area get in touch with the conductive film, the lower the resistance. Therefore, the more pressure applied on the sensor, the more the layers touch the conductive film and that makes the resistance go down.

How does Arduino measure force?

In order to measure the applied force with an Arduino, you will need to build a voltage divider circuit with the FSR and a pull-down resistor. This circuit creates a variable voltage output that can be read by the ADC (analog to digital converter) input of the microcontroller.

### Where are force sensitive resistors used?

Sensitronics is the leader of The Force-Sensing Resistor (FSR) technology. Force Sensing Resistors can be used for such applications as computer input devices, musical instruments, medical instruments, robotics, automotive, interactive toys, sports and more.

How accurate are force sensitive resistors?

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 FSRs you should only expect to get ranges of response.

## How do piezoelectric force sensors work?

Working principle. When a force is applied to a piezoelectric material, an electric charge is generated across the faces of the crystal. This can be measured as a voltage proportional to the pressure (see diagram to the right). A given static force results in a corresponding charge across the sensor.

How is Force Sensitive Resistor ( FSR ) used in Arduino?

This Arduino sketch that assumes you have the FSR wired up as above, with a 10K? pull down resistor and the sensor is read on Analog 0 pin. It is pretty advanced and will measure the approximate Newton force measured by the FSR. This can be pretty useful for calibrating what forces you think the FSR will experience.

### What can a force sensing resistor be used for?

FSRs are super robust pressure sensors that are used in all kinds of industries. You will find them in electronic drums, mobile phones, handheld gaming devices and many more portable electronics. These sensors are easy to use and great for sensing pressure. In this tutorial you will learn how an FSR works and how to use it with Arduino.

How do you measure force with an Arduino?

In order to measure the applied force with an Arduino you will need to build a voltage divider circuit with the FSR and a pull-down resistor. This circuit creates a variable voltage output that can be read by the ADC (analog to digital converter) input of the microcontroller.

## What should the voltage be on a FSR sensor?

This means that it will map the input voltage between 0 and 5 V into integer values between 0 and 1023. So you should see a value between 0 and 1023 in the serial monitor, depending on how hard you squeeze the sensor. /* Simple example code for Force Sensitive Resistor (FSR) with Arduino.