FSR 402 Force Sensitive Resistor | Compoden
FSR 402
The FSR 402 is a round force-sensitive resistor with a 14.7 mm active area that decreases its resistance as physical pressure increases. It is widely used in touch interfaces, musical instruments, and robotics for analog force feedback. The sensor is thin, flexible, and requires only a simple voltage divider circuit to interface with microcontrollers.
Key Specifications
| Specification | Value |
|---|---|
| Active Area Diameter | 14.7 mm |
| Thickness | 0.46 mm |
| Actuation Force | ~0.1 N |
| Force Sensitivity Range | 0.1 N – 100 N |
| Resistance Range | Infinite (no load) to ~300 Ω (max load) |
| Temperature Range | -30°C to +70°C |
What You Can Build With This
- Pressure-sensitive MIDI drum pads and music controllers
- Grip force detection in robotic hands and prosthetics
- Muscle activity monitoring for physiotherapy wearables
- Custom touch-sensitive buttons for interactive art
Compatibility
The FSR 402 works with any analog-capable board, including Arduino, ESP32, Raspberry Pi (with ADC), and STM32. A typical setup uses a 10 kΩ pull-down resistor and a 5V supply, scaling the analog voltage from 0V (no touch) to near Vcc (hard press). It fits standard breadboards and perfboards with minimal soldering.
Wiring Notes
Connect one terminal of the FSR to 5V, the other terminal to a 10 kΩ resistor to ground, and the junction point to an analog input. Do not exceed 100 N of force, as this can permanently deform the sensor. For consistent readings, ensure the contact surface is flat and clean.
Why Buy from Compoden
Every 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.
Is this compatible with Arduino?
Yes, the FSR 402 is straightforward to use with Arduino. Wire it with a 10 kΩ resistor in a voltage divider configuration and read the analog pin using analogRead(). The sensor provides a relative force reading.
Can it measure weight accurately?
The FSR 402 is not designed for precision weight measurement. It detects relative pressure changes and can be calibrated for approximate force, but for gram-level accuracy a load cell is a better choice.
Does it work with 3.3V logic?
Yes, the sensor works with 3.3V. The output voltage will scale proportionally; you may adjust the pull-down resistor value (e.g., 10 kΩ remains suitable) to optimise the analog reading range on a 3.3V ADC.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items