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Force-Sensing Resistor - 0.5" Circle
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Force-Sensing Resistor - 0.5" Circle
This force-sensing resistor (FSR) from Interlink Electronics is a passive component that exhibits a decrease in resistance when there is an increase in the force applied to the circular active area (0.5"/12.7mm diameter), allowing you to create a sensor that is able to detect force or pressure. The polymer thick film (PFT) device is optimized for use in human touch control of electronic devices and can sense an applied force ranging from a few dozen grams to over 2 kg.
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This force-sensing resistor (FSR) from Interlink Electronics is a passive component that acts as a variable resistor, with resistance decreasing in response to increasing applied force, which makes it easy to add a touch interface to your project or create a robot with much more sophisticated tactile senses than are possible with simple lever switches. The polymer thick film (PFT) device is optimized for use in human touch control of electronic devices and can sense an applied force anywhere in the active area ranging from a few dozen grams to over 2kg.
In our tests, the resistance exceeded 1 MΩ with no applied pressure and ranged from around 100 kΩ to a few hundred Ohms as finger pressure varied from light (a few dozen grams) to heavy (pressing as hard as possible). The resistance is very stable when the pressure is fixed, and the readings are very repeatable (there are no problems with hysteresis). This resistance range is well suited to work directly with the internal pull-ups of many microcontrollers such as AVRs and PICs. The FSR was responsive enough and sensitive enough to distinctly pick up light, rapid finger tap, and it was even able to pick up the vibrations of a small vibration motor placed on it on the motor’s side.
The 0.72"-diameter circular pad is flexible, light (0.25 g), and extremely thin (0.02"), and it has a circular active sensing area with a diameter of 0.5". It does not appreciably compress when pressure is applied. The FSR has a masked adhesive backing for easy mounting, and the 1.2" flexible male leads give you a convenient way to integrate the part into your project. The two leads have a 0.1" spacing, which means they are compatible with most solderless breadboards and perfboards, though the solder tabs are too short to work well with many 0.1" connectors.
Note that this FSR is not a load cell or strain gauge, and it is not suitable for precision measurements. While it can be used for dynamic measurement, only qualitative results are generally attainable. Force accuracy ranges from 5% to 25% depending on a number of factors, and the resolution is better than 0.5% of the full range. Please see the datasheet (1MB pdf) for more information, including force-vs-resistance curves, integration notes, usage tips, and suggested electrical circuits.
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A variety of force-sensing resistors (FSR). |
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We have four versions of force-sensing resistors available, which lets you choose the one with the dimensions that best suit your application:
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Force-Sensing Resistor - 1.5" Square |
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Force-Sensing Resistor - 0.2" Circle |
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MinIMU-9 Gyro, Accelerometer, and Compass (L3G4200D and LSM303DLM Carrier) |
Force-Sensing Resistor - 0.2" Circle
Deflection sensor 114 mm long. The sensor resistance changes with the bend angle. At the end, the sensor has a 2-pin connector with a pitch of 2.54 mm. SparkFun SEN-08606
Round, flexible, pressure sensor that can be used to implement very sensitive force detection. The sensor is durable and designed to detect static and dynamic pressure at high response speeds. DFRobot SEN0297
A round, flexible, pressure sensor that can be used to realize very sensitive force detection. The sensor is durable and designed to detect static and dynamic pressure at high reaction speed. DFRobot SEN0298
Flexiforce Pressure Sensor A201 – 1lb, Tekscan, RoHS
A simple flex sensor 2.2" in length. As the sensor is flexed, the resistance across the sensor increases. SEN-10264
Force-Sensing Resistor - 1.5" Square
The SparkFun Load Sensor Combinator is a bare PCB that combines four load sensors into a standard four-wire Wheatstone bridge configuration. BOB-13878
Flexible pressure sensor with dimensions of 400x15 mm. Designed to detect static and dynamic pressure at high reaction speed. DFRobot SEN0299
This disc load cell (sometimes called a strain gauge) can translate up to a whopping 200kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the disc. SEN-13332
SEN-11207 - Flexiforce Pressure Sensor - 25lbs (1" area)
Set with the ADC HX711 transducer module and a pressure sensor in the form of a tensometric beam. It communicates via the UART interface. It allows you to build a simple home scale. DFRobot SEN0160
Simple-to-use, open source solution for measuring weight and temperature with the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value, sample rate, time stamp and units of precision. SEN-13261
Deflection sensor 114 mm long. The sensor resistance changes with the bend angle. At the end, the sensor has a 2-pin connector with a pitch of 2.54 mm. SparkFun SEN-08606
Flexible pressure sensor with dimensions of 40 x 40 mm. Designed to detect static and dynamic pressure at high reaction speed. DFRobot SEN0296
Force-Sensing Resistor - 0.2" Circle
Module with a deflection sensor with two measuring probes. The board houses the ADS1015 converter, which is an ADC converter with an output in the form of an I2C interface. SparkFun SEN-14666
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Force-Sensing Resistor - 0.5" Circle