FLEX SENSOR SERVO MOTOR ARDUINO SERIAL
The following code is used to read the analog data from the Flex Sensor and display it on the serial monitor of Arduino. Just to show some output, I have connected an LED (along with its current limiting resistor of course) to Digital I/O Pin 7 of Arduino UNO. This connection means that the flex sensor and the 10KΩ resistor for a voltage divider. A 10KΩ resistor is connected between A0 and +5V.
One end of flex sensor is connected to GND while the other end is connected to Analog Input A0 of Arduino. It is a simple Arduino Flex Sensor Hook-up circuit.Īs I have already mentioned in the Basic Flex Sensor Circuit part that a flex sensor is nothing but a variable resistor and it can be configured in a voltage divider fashion along with another resistor to measure the analog voltage. The following image shows the first of two circuits I am going to implement. In the second circuit, using a similar Arduino Flex Sensor Interface, I will control a TowerPro SG90 Servo Motor. I will design two simple circuits using Flex Sensor and Arduino, wherein the first circuit is just a basic hook-up guide of Flex Sensor with Arduino. Now that we have seen a little bit about what a flex sensor is and how a flex sensor works, we will now proceed to interfacing a flex sensor with Arduino UNO board. The following image shows the basic flex sensor circuit consisting of a voltage divider (formed by the flex sensor itself and a 10KΩ Resistor) and an Operational Amplifier (Op-Amp). Since the underlying concept of Flex Sensor is a variable resistor, you can easily guess the Basic Flex Sensor Circuit that can be implemented. The Carbon Resistive Type Flex Sensor, which is sometimes called as Velostat Flex Sensor, is the commonly used Flex Sensor by DIYers and hobbyists. NOTE: The resistance values mentioned here are specific to the Flex Sensor which I am using and they are not universal.ĭepending on the type of resistive material used on the surface of the Flex Sensor, there can be different types of Flex Sensors.
If I further bend it towards a complete 180 0 angle, the resistance of the flex sensor shoots up to around 75KΩ. When I bend the sensor as shown in the following image, the resistance increases with the increase in the bend angle.Īt a bend angle of approximately 45 o, the resistance of the flex sensor has increased to 65KΩ and when I continue to bend it at an angle of 90 0, the resistance further increases to 70KΩ. In my case, the normal resistance of the Flex Sensor is around 60KΩ. a flex sensor as rest, exhibits a normal resistance value. Since a flex sensor is basically a resistor (whose resistance varies depending on its bend), it has two terminals (or leads).Ĭoming to the variable resistance part, an unflexed sensor i.e. It is about 0.6cm wide and 8cm long (including the two connectors).
The Flex Sensor used in this project is shown in the following image. Usually, a Flex Sensor is made up of a variable resistive surface and the amount of resistance is varied by bending the sensor. What is a Flex Sensor?Ī Flex Sensor or sometimes called as Bend Sensor is a device that measures the amount of bend or angular deflection. But there is one sensor which I haven’t discussed or brought up until now. We have seen several Types of Sensors like Light, Temperature, Humidity, Proximity, Infrared, Heartbeat, Tilt, Flame etc.
FLEX SENSOR SERVO MOTOR ARDUINO HOW TO
In this project, we will learn about Flex Sensors, how a Flex Sensor works, how to interface a Flex Sensor with Arduino and finally control devices like LED and Servo Motor with Flex Sensor and Arduino.
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