FSR 402 Force Sensitive Resistor
by Interlink / clone
SKU: PSA-CMP-FSR
No reviews yetTypical India street price
₹150–₹400
Pressure pad for footsteps, grips, and “touch how hard”.
Interface: Analog
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Concept
Polymer film whose resistance drops as force increases.
A little theory
Not a scale (use HX711 for mass). Log-ish curve. 10 kΩ divider typical. In the classroom, treat FSR 402 Force Sensitive Resistor as a beginner part using Analog. Typical India street price is about ₹150–₹400. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
analogRead; map empirically with known weights for a demo, not for trade.
Classroom & project use
- Piano velocity
- Shoe pressure
- Robot grasp
Buying in India
Precautions
- Share a common GND with the microcontroller
- Verify polarity and voltage before powering the circuit
Specifications
| Size | ~12.7mm sensing |
| Type | FSR |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 3.3–5V divider |
| Interface | Analog |
Pinout
VCC | GND | AO (and DO if comparator module)
