Potentiometer Readings Off

Projects Programming
17

just an FYI for all who read this...

This code below, when removing the LED_GO from the entire code will have the correct readings throughout with the same wiring. No removed parts from the board or disconnected wires.

const byte LED_PIN = 9;  // the PWM pin the LED is attached to
// const byte LED_GO = 2;
const byte BTN1 = A1;

boolean START = false;


void setup() {
  Serial.begin(9600);
  
  pinMode(LED_PIN, OUTPUT);
  // pinMode(LED_GO, OUTPUT);
  pinMode(BTN1, INPUT);
}


void loop() {

  if (digitalRead(BTN1) == HIGH)
  {
    // digitalWrite(LED_GO, HIGH);
    START = true;
  }
  else {
    // digitalWrite(LED_GO, LOW);
    digitalWrite(LED_PIN, LOW);
    START = false;
  }

  if (START)
  {
    // reads the input on analog pin A0 (value between 0 and 1023)
    int analogValue = analogRead(A0);

    // scales it to brightness (value between 0 and 255)
    int brightness = map(analogValue, 0, 1023, 0, 255);

    // sets the brightness LED that connects to  pin 9
    analogWrite(LED_PIN, brightness);


    Serial.print("Analog: ");
    Serial.print(analogValue);
    Serial.print(", Brightness: ");
    Serial.println(brightness);
    delay(5);
  }
}