The 4.5 Inch Flex Sensor is a resistive strip that changes its electrical resistance (opposition to current flow) when bent. When the flex sensor arduino project bends the strip, the carbon resistive ink on one side compresses and stretches, increasing resistance proportionally with bend angle. At rest, resistance stays at a baseline value. At full bend, it rises significantly. The sensor is 12cm long and 1mm thick, with an operating voltage of 3.3V to 5V. You read it through a voltage divider (a two-resistor circuit that converts resistance change into a voltage change) and feed that voltage into an ADC (Analog to Digital Converter) pin on your microcontroller.
A non-obvious detail about the flex sensor price tier is that the ±30% resistance tolerance between individual sensors is wider than most analog sensors. Each unit must be calibrated against a known bend angle before your code can produce accurate degree values. The honest trade-off is directional sensitivity.
The hand gesture sensor works with Arduino IDE using simple analogRead and a voltage divider resistor. hobbyists building gesture-controlled robots, making data gloves, and makers prototyping wearable input devices use it. Connect the sensor in a voltage divider with a 10kΩ resistor, read the ADC value, and map it to degrees in your sketch. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.
Related Products:
- Check out the Square Force Pressure Sensor Module
Features:
- 4.5 inch strip length provides enough coverage for finger or wrist bend angle measurement.
- Operating voltage of 3.3V to 5V connects directly to standard microcontroller analog input pins.
- 1mm thickness allows the sensor to fit flat inside fabric gloves or soft enclosures.
- flex sensor 4.5 inch resistance tolerance of ±30% requires per-unit ADC calibration for accurate angle mapping.
Technical specifications:
| Specification | Details |
|---|---|
| Length | 4.5 inch |
| Operating voltage | 3.3V to 5V |
| Resistance Tolerance | ±30% |
| Resistance range | Varies with bend angle |
| Length | 12 cm |
| Thickness | 1 mm |
| Life Cycle | >1 million |
Applications:
- Hand gesture glove project uses this sensor to detect finger bend and control a servo motor.
- Robot hand prototype maps finger angle from resistance change to actuate individual finger servos.
- 4.5 Inch Flex Sensor reads bend angle over ADC and sends gesture commands wirelessly to a receiver board.
- flex senso measures wrist rotation in a sports wearable and calculates bend angle for motion analysis.
Package includes:
- 1 x 4.5 Inch Flex Sensor
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