Adafruit
Square Force-Sensitive Resistor (FSR) [Interlink 406]
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 ...
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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.
FSRs 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.
Key Features
- 38 mm Square Sensing Area – Larger active region than round FSRs
- Variable Resistance – Changes in ohms (Ω) proportional to applied force
- Breadboard Compatible – Plug directly into a breadboard
- Low Cost & Simple – Easy analogue input for microcontrollers
Specifications
- Model – Interlink 406
- Sensing Area – 38 × 38 mm (square)
- Output – Variable resistance (analogue)
- Tolerance – ~±10% sensor-to-sensor
Ideal For
- Pressure and touch detection
- Weight-sensing projects (approximate)
- Interactive art and musical instruments
- Robotics grip sensing
Package Contents
- 1× Square Force-Sensitive Resistor (Interlink 406)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- FSR
- FSR usually means full-scale range, the total span between the lowest and highest value a converter can output or measure, so error figures quoted as a percentage of FSR depend on the selected range such as 2.5 V or 5 V. In other contexts FSR can instead mean a force-sensing resistor, a component whose resistance changes with applied pressure, so check which sense is meant.
- Terminal block
- A terminal block is a connector that joins wires together in a neat, removable, or serviceable way, usually clamping each wire under a screw or spring instead of soldering. It makes it easier to connect, change, or service wiring without permanent joints.
- Tolerance
- Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.
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Related Tutorials
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