# Flex sensor hookup

### How does a flex sensor work?

The flex sensor is a cost-effective and straightforward device that helps you to measure the amount of bending. Further, you can also call the device a Flexible Potentiometer because its resistance is directly proportional to the amount of deflection. Also, the two-terminal device changes its terminal resistance when you bend the sensor.

### What happens to the resistance of a flex sensor when bent?

When it is bent 45º angle the FLEX SENSOR resistance increases to twice as before. And when the bent is 90º the resistance could go as high as four times the nominal resistance. So the resistance across the terminals rises linearly with bent angle.

### What is the pin configuration of the flex sensor?

The pin configuration of the flex sensor is shown below. It is a two-terminal device, and the terminals are like p1 & p2. This sensor doesn’t contain any polarized terminal such as diode otherwise capacitor, which means there is no positive & negative terminal.

### What type of flex sensor do you need?

Conductive ink Flex Sensor The Carbon Resistive Type Flex Sensor, which is sometimes called as Velostat Flex Sensor, is the commonly used Flex Sensor by DIYers and hobbyists. Basic Flex Sensor Circuit Since the underlying concept of Flex Sensor is a variable resistor, you can easily guess the Basic Flex Sensor Circuit that can be implemented.

### What is the working principle of flex sensor?

Working Principle of Flex Sensor This sensor device works on the principle of bending strip means when its strip is bend then its resistance is changed which is measured with any controller. Another words, this sensor works like a variable resistance whose resistance is changed when it is bend.

### What happens to the voltage when the flex sensor is bent?

As shown in figure, R1 here is a constant resistance and FLEX SENSOR which acts as a variable resistance. Vo being output voltage and also the voltage across the FLEX SENSOR. Vo = VCC (Rx/ (R1+Rx)). Now, when the FLEX SENSOR is bent the terminal resistance increases. This increase also appears in VOLTAGE DIVIDER circuit.

### Why flex sensor is called bend sensor?

Actually, it is made up with carbon surface on a plastic strip when this strip is bend or deflect then the resistance of this flex sensor is changed therefore it is also called bend sensor. Because its changing resistance is directly proportional to amount of bend therefore it can also be used as a goniometer.

### What is a flex-sensor?

Here this article discusses an overview of 2.2-inch flex-sensor. This type of sensor is used in various applications like computer interface, rehabilitation, servo motor control, security system, music interface, intensity control, and wherever the consumer needs to modify the resistance throughout bending.

### What is a flex sensor?

A flex sensor or bend sensor is a sensor that measures the amount of deflection or bending. Usually, the sensor is stuck to the surface, and resistance of sensor element is varied by bending the surface. Since the resistance is directly proportional to the amount of bend it is used as goniometer, and often called flexible potentiometer.

### What is the difference between flex sensor resistance and conductive bend sensor?

Flex sensor resistance is not the same for all devices, so determine you own flex sensors resistance using an ohmmeter before writing code. Conductive bend sensors are unipolar sensors, which means the change of resistance is true only if you bend it in one direction.

### What happens to the voltage when the flex sensor is bent?

As shown in figure, R1 here is a constant resistance and FLEX SENSOR which acts as a variable resistance. Vo being output voltage and also the voltage across the FLEX SENSOR. Vo = VCC (Rx/ (R1+Rx)). Now, when the FLEX SENSOR is bent the terminal resistance increases. This increase also appears in VOLTAGE DIVIDER circuit.

### Can a flex sensor be used as a goniometer?

Because its changing resistance is directly proportional to amount of bend therefore it can also be used as a goniometer. There are two types of flex sensors are currently used in industry according to their size first one is 2.2 inch flex sensor and second one 4.5 inch flex sensor.