{"product_id":"391mm-square-force-sensor-pressure-sensitive-resistor","title":"39.1mm Square Force Sensor – Pressure Sensitive Resistor","description":"\u003ch1\u003e39.1mm Square Shaped Force Sensor (FSR) – 0.1N to 20N Range\u003c\/h1\u003e\u003cp\u003eThe 39.1mm square force sensor is a force-sensitive resistor (FSR) that changes resistance when pressure is applied. It’s ideal for detecting physical pressure, squeezing, and weight in human-machine interfaces, musical instruments, and robotics projects. With a large 39.1mm square active area, it provides reliable readings for various force ranges.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForce Range\u003c\/td\u003e\n\u003ctd\u003e0.1N to 20N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance (No Load)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;10 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResistance (Full Load)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;200 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Area\u003c\/td\u003e\n\u003ctd\u003e39.1mm x 39.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.45 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSmart grip pressure monitor\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/arduino-electronic-drum-kit-build-and-code-your-own-beat-pad\"\u003eDIY electronic drum pad\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eRobot tactile sensor\u003c\/li\u003e\n\u003cli\u003eBed occupancy sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis force sensor works with any microcontroller that can read analog voltage, including Arduino Uno, Nano, Mega, and Raspberry Pi (with ADC). Use a 10kΩ pull-down resistor to create a voltage divider circuit. Operates at 3.3V or 5V.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect one pin to VCC, the other to an analog input pin with a 10kΩ resistor to GND to form a voltage divider. The output voltage increases with greater force. Avoid exceeding 20N to prevent sensor damage.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it can be connected to an analog input using a voltage divider circuit with a 10kΩ resistor. It works with any Arduino board.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I measure weight with this sensor?\u003c\/summary\u003e\u003cp\u003eIt can detect force up to 20N (approx. 2kg). For precise weight measurement, a load cell is recommended, but this sensor is great for force presence and relative pressure.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the force sensor?\u003c\/summary\u003e\u003cp\u003eCalibration involves applying known forces and mapping the analog readings. Since FSRs are not precision devices, you'll need to calibrate for your specific application to get force in Newtons.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444958323053,"sku":"CDN-0322","price":300.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_f45af8b4-d9c3-4525-b54b-59ccc07729bc.jpg?v=1781512446","url":"https:\/\/compoden.com\/products\/391mm-square-force-sensor-pressure-sensitive-resistor","provider":"Compoden","version":"1.0","type":"link"}