RGB Not displaying Red when using LCD I was testing my RGB (common anode) on its own playing with colours and got the red, green to work as desired.

However, when I connected my LCD board to my Arduino Uno as well as the RGB (using the same code prior and same output pins so I know the code isn't the issue) the RGB no longer displays red.

I assume it has something to do with the fluctuating voltage/current after I've put in the LCD but I cant work out how to resolve it. When its meant to be red it's just nothing, doesn't light up, green however still works.

#include &lt;LiquidCrystal.h&gt;
#define COMMON_ANODE
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
int SelectCounter = 0;
int hours = 0; // start hours
int minutes = 0; //start min
int seconds = 5; //start seconds
int redPin = A1;
int greenPin = 2;
int bluePin = 3;
int digitposition = 0;
int readkey;
int speaker = A5;
int buttonPin = A4;
int buttonPushCounter = 0;   // counter for the number of button presses
int buttonState = 0;         // current state of the button
int lastButtonState = 0; 

void setup() {
pinMode(speaker, OUTPUT);
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT); 
pinMode(buttonPin, INPUT);
Serial.begin(9600);
}

void loop() {
noTone(speaker);
setColor(0, 0, 255); // red

....... }

void trigger() {
  lcd.clear(); // clears the screen and buffer
 lcd.setCursor(6,0);
 lcd.println("MUM:      ");
 lcd.setCursor(4, 1); // set timer position on lcd for end.
 lcd.println("WAKE UP!    ");
 tone(speaker, 10);
 setColor(0, 255, 0);  // green
 delay(500);
 digitalWrite(A1, HIGH);
 digitalWrite(2, HIGH);
 digitalWrite(3, HIGH);
 noTone(speaker);
 delay(500); 
 lcd.display();
 }

void setColor(int red, int green, int blue)
{
  #ifdef COMMON_ANODE
   red = 255 - red;
   green = 255 - green;
   blue = 255 - blue;
 #endif
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);  
}
Only the pins with a ~ next to it are PWM pins. The pin connected to the red led, pin A1, does not support PWM, so analogWrite will not have the desired effect.