This Rotary Potentiometer Module produces analog output between 0 and Vcc (5V DC with Arduino) on its D1 connector. The D2 connector is not used. The angular range is 300 degrees with a linear change in value. The resistance value is 10kohm, perfect for Arduino use.

Test Code

int adcPin = A0; // input pin for the potentiometer
int ledPin = 5; // select the pin for the LED
int adcIn = 0; // variable to store value coming from sensor

void setup() {
Serial.begin(9600); // init serial to 9600b/s
pinMode(ledPin, OUTPUT); // set ledPin to OUTPUT
Serial.println(“Rotary Potentiometer Test Code!!”);
}

void loop() {
// read the value from the sensor:
adcIn = analogRead(adcPin);
if(adcIn >= 500) digitalWrite(ledPin,HIGH);
else digitalWrite(ledPin, LOW);
Serial.println(adcIn);
delay(100);
}