{"title":"Round Force-Sensitive Resistor (FSR) [Interlink 402]","handle":"round-force-sensitive-resistor-fsr-interlink-402","url":"/products/round-force-sensitive-resistor-fsr-interlink-402","description":"The Interlink 402 is a round force-sensitive resistor (FSR) with a 12.7 mm (0.5″) sensing area. It changes resistance based on applied pressure — the harder you press, the lower the resistance — making it a simple, low-cost way to detect physical pressure, squeezing, and weight in your projects.\n\nFSRs provide a range of response rather than precise measurements, with approximately ±10% variation between sensors. They're ideal for detecting relative force (light touch vs. hard press) but not suited for exact weight measurement. Connect using a breadboard, alligator clips, female headers, or terminal blocks — soldering directly to the tabs risks melting the plastic and damaging the sensor.\n\nKey Features\n\n\n12.7 mm (0.5″) Round Sensing Area – Compact force detection zone\n\nVariable Resistance – Decreases with applied pressure\n\nSimple Analogue Interface – Read with any microcontroller's ADC pin\n\nLow Cost – Affordable pressure sensing for prototypes\n\nFlexible Plastic Construction – Thin and easy to mount\n\n\n\nWarning: Do not solder directly to the FSR tabs unless you are confident in your soldering skills. The plastic material melts quickly — use a breadboard, clamp connector, or terminal block instead.\n\n\nIdeal For\n\nTouch and pressure detection in interactive projects\nWearable electronics and e-textiles\nMusical instruments and game controllers\nSqueeze and grip detection\n\n\nPackage Contents\n\n1× Round Force-Sensitive Resistor (Interlink 402)\n\n\nResources\n\nFSR Tutorial — Wiring, Code Examples & Projects\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11521,"title":"Default Title","sku":"AF-166","price":13.9,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":102,"option1":"Default Title"}]}