Flex Sensor 2.2 inch
Overview
Flexible bend/angle detection sensor
Works as a variable resistor
Resistance changes when the sensor is bent
Widely used in robotics, wearables, and motion tracking
Working Principle
Sensor contains conductive ink layer on flexible substrate
When bent conductive path stretches
Resistance increases with bending angle
Microcontroller reads change using voltage divider circuit
Flat = low resistance, Bent = high resistance
Key Specifications
Length: 2.2 inch (~56 mm)
Type: Resistive bend sensor
Flat Resistance: ~10k 40k
Operating Voltage: 3.3V 5V
Bend Range: Up to ~90 (typical)
Output: Analog (via voltage divider)
Pin Configuration
Pin 1 VCC / Signal
Pin 2 GND
No polarity restriction (acts like resistor)
Features
High sensitivity to bending & flexing
Lightweight and flexible
Easy to interface with microcontrollers
Smooth analog output proportional to bend
Long life cycle (>1 million bends typical)
Applications
Gesture control gloves
Robotic fingers
VR / gaming controllers
Prosthetics & biomedical devices
Posture monitoring systems
Motion tracking & wearable tech
Usage Tips
Use voltage divider circuit for accurate readings
Avoid bending near connector/base (fragile area)
Calibrate flat and bent values in code
Do not over-bend may damage sensor
Mount securely for consistent readings
Advantages
Simple working principle
Easy integration
Good sensitivity to small bends
Low power consumption
Limitations
Not highly precise (needs calibration)
Non-linear response
Can wear out if overused
Sensitive to mechanical stress
Summary
A 2.2-inch flexible resistive sensor
Outputs analog signal via voltage divider
Ideal for gesture control, robotics, and wearable electronics