Flex Sensor 2.2″ Bend Detection Sensor

Flex Sensor 2.2″ Bend Detection Sensor

A Flex Sensor is a variable resistor whose resistance changes based on the amount of bending applied to it. When the sensor is straight, it has a nominal resistance, and as it bends, the resistance increases proportionally. This unique property makes the flex sensor ideal for detecting angular displacement, bending, and motion.

Working Principle

The flex sensor is constructed using a conductive polymer ink printed on a flexible substrate. When the sensor bends, the conductive material stretches, causing an increase in electrical resistance. This change in resistance can be measured using a voltage divider circuit and read by a microcontroller’s analog input.

Key Features

• Thin, lightweight, and flexible design

• Resistance varies with bending angle

• Easy to interface with microcontrollers

• Low power consumption

• Durable and reliable for repeated use

Electrical Characteristics

• Type: Variable resistor

• Resistance (flat): ~10 kΩ (typical)

• Resistance (bent): Up to 30–70 kΩ (depending on angle)

• Operating Voltage: 3.3V – 5V

• Output: Analog

Applications

• Gesture recognition systems

• Robotics and automation

• Wearable electronics

• Human–machine interaction

• Medical and rehabilitation devices

• Gaming controllers

• IoT and smart devices

Advantages

• Simple and cost-effective sensing solution

• High flexibility and mechanical strength

• Suitable for wearable and portable designs

• Easy integration with Arduino, Raspberry Pi, and other controllers

Conclusion

The Flex Sensor is a versatile and widely used sensing device for detecting bending and motion. Its simple working principle, flexibility, and compatibility with microcontrollers make it an essential component in robotics, wearable technology, and interactive electronic projects.