{"title":"Square Force-Sensitive Resistor (FSR) [Interlink 406]","handle":"square-force-sensitive-resistor-fsr-interlink-406","url":"/products/square-force-sensitive-resistor-fsr-interlink-406","description":"A force-sensitive resistor (FSR) that changes its resistance based on how much pressure is applied. This Interlink 406 model features a 38 mm square sensing region, making it useful for detecting physical pressure, squeezing, and weight in your projects.\n\nFSRs are simple and low cost, but not precision instruments — expect approximate ranges of response rather than exact measurements. Resistance varies from sensor to sensor by roughly 10%, so they're best for detecting relative force rather than precise weight.\n\nKey Features\n\n\n38 mm Square Sensing Area – Larger active region than round FSRs\n\nVariable Resistance – Changes in ohms (Ω) proportional to applied force\n\nBreadboard Compatible – Plug directly into a breadboard\n\nLow Cost & Simple – Easy analogue input for microcontrollers\n\n\n\nTip: The connection tab is crimped onto delicate plastic. Use a breadboard, alligator clips, female header, or terminal block to connect. Soldering is possible but requires a quality iron and quick technique — prolonged heat will melt the plastic and ruin the sensor.\n\n\nSpecifications\n\n\nModel – Interlink 406\n\nSensing Area – 38 × 38 mm (square)\n\nOutput – Variable resistance (analogue)\n\nTolerance – ~±10% sensor-to-sensor\n\n\nIdeal For\n\nPressure and touch detection\nWeight-sensing projects (approximate)\nInteractive art and musical instruments\nRobotics grip sensing\n\n\nPackage Contents\n\n1× Square Force-Sensitive Resistor (Interlink 406)\n\n\nResources\n\nFSR Tutorial (Adafruit Learn)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":6915,"title":"Default Title","sku":"AF-1075","price":14.51,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":2,"option1":"Default Title"}]}