The FSR-402 is a round force sensitive resistor that detects physical pressure, touch, and applied force. Its electrical resistance drops as more force is pressed onto its sensing area, giving you a simple analog signal you can read with any microcontroller. It's a favorite among makers, students, and electronics hobbyists building interactive and force-aware projects.
Key features
- Round FSR-402 sensing element with a clearly defined active force area.
- Resistance changes smoothly as applied pressure increases, for easy analog reading.
- Thin, lightweight, and flexible — fits neatly under buttons, pads, and surfaces.
- Compatible with popular microcontroller boards such as Arduino and Raspberry Pi setups.
- Simple two-pin connection that works well on a breadboard or soldered into a project.
Typical uses
- Touch and pressure-sensing buttons or pads for DIY electronics.
- Robotics grippers and feedback systems that need to sense contact.
- Student and prototyping projects, weight or grip detection, and interactive art.
- Smart wearables, musical controllers, and gaming controller experiments.
How to choose / tips
- Use a voltage divider with a fixed resistor to convert the FSR signal into a clean analog reading.
- Mount the sensor on a flat, firm surface so force lands on the active area.
- Avoid bending it sharply at the connector tail to protect the contacts.
- Calibrate in your own code, since force-to-resistance response varies by project.
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