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Force Sensing Resistor 0.6’’ Diameter Circle 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 (PTF) 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 a few kilograms (0.2 N to 20 N).
In the 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. Force Sensing Resistor 0.6’’ Diameter Circle was responsive enough and sensitive enough to distinctly pick up light, rapid finger taps.
The 0.72″-diameter circular pad of Force Sensing Resistor 0.6’’ Diameter Circle is flexible, light (0.15 g), and extremely thin (0.01″), and it has a circular active sensing area with a diameter of 0.58″. Force Sensing Resistor 0.6’’ Diameter Circle has a masked adhesive backing for easy mounting, and the 1.7″ flexible male leads give you a convenient way to integrate the part into your project. The two male pins (called “solder tabs”) have a 0.1″ spacing, which means they are compatible with most solderless breadboards.
Pololu Web Site: https://www.pololu.com/product/1696
