The Square Force Pressure Sensor Module detects how hard something is pressing on it using an FSR (Force Sensitive Resistor — a component whose resistance drops as pressure increases). The force sensitive resistor changes resistance from very high when untouched to very low under firm pressure. You read that resistance change through a voltage divider (a two-resistor circuit that converts resistance into a readable voltage) connected to an ADC (Analog to Digital Converter) pin. The sensing area is 1.75 x 1.5 inches, which covers a broader surface than round FSR variants.
A non-obvious detail about the force sensor is that FSR readings are not linear. A small amount of force causes a large resistance drop, but adding more force beyond a threshold produces progressively smaller changes. This means the sensor is more sensitive at low loads than high loads. FSRs are not precision load cells — they drift with temperature and repeated use, so they suit detection and comparison tasks rather than exact weight measurement.
The pressure sensor arduino pairing works through a voltage divider resistor and the analog Read function. Detecting button presses without mechanical switches, hobbyists building smart seating mats, and creating pressure-activated triggers with sensor. Connect the FSR in a voltage divider with a 10kΩ resistor, read the ADC, and map the value to pressure levels in sketch. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.
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Features:
- FSR sensing area of 1.75 x 1.5 inches covers a full finger or palm contact zone.
- Operating voltage of 3.3V to 5V connects directly to standard microcontroller ADC input pins.
- 25 gram module weight makes the sensor suitable for lightweight wearable and textile-embedded builds.
- force pressure sensor square shape allows flat surface mounting under keyboard keys or pressure pads.
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