Example Code for Arduino-Linear Position Detection

Hardware Preparation

• DFRduino UNO+IO Expansion Board (SKU:DFR0216-2) ×1
• Linear Flexible Potentiometer（SKU:SEN0690）×1

Software Preparation

• Download Arduino IDE： Click to download Arduino IDE

Wiring Diagram

Other Preparation Work

• Upload the following code and open Serial monitor to check the output

Sample Code

/*!
const int sensorPin = A0;         // Connect the sensor output to analog pin A0
const float Vcc = 5;              //Input pin voltage   5V   
const float Vin = 3.3;            //Input pin voltage   5V   
const float totalLength = 280.0;  // Total Sensor Length (mm)


void setup() {
  Serial.begin(9600);
  Serial.println("Current Position (mm)	Original Voltage (V)");
 }

void loop() {
  float rawVoltage = analogRead(sensorPin) * (Vcc/1023);    //5V Input
  //float rawVoltage = analogRead(sensorPin) * (Vin/((Vin/Vcc)*1023));    //3.3 Input
 
  float actualVoltage = rawVoltage;
  float position = 0.0;
  position = (rawVoltage / Vcc) * totalLength;

 // Position limiting (0-280mm)
  position = constrain(position, 0.0, totalLength);


  Serial.print("Current Position：");
  Serial.print(position);
  Serial.print(" mm\t\t");
  Serial.print("Current Position：");
  Serial.print(rawVoltage);
  Serial.println(" V");

  delay(50);  
}

Result