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Fade LEDs

26/3/2018

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Introduction

Fade the LEDs with the trimmer. Use the LCD to print the selected PWM value.

What you will need - Hardware

We will use:

Connections

LEDs and Trimmer

Arduino UNO pin 9 --> LED1
Arduino UNO pin 10 --> LED2
Arduino UNO pin 11 --> LED3
Arduino UNO pin A1 --> Trimmer ( Potentiometer )

Nokia 5110 LCD (Blue PCB)

Arduino UNO pin 3 --> CLK
Arduino UNO pin 4 --> Din
Arduino UNO pin 5 --> DC
Arduino UNO pin 6 --> CE
Arduino UNO pin 7 --> RST

Code

/*
 * === Ardumotive Shield for Arduino UNO Board ===
 * Arduino Tutorial: Fade LEDs
 * Dev Michalis Vasilakis/Date 24/3/2018/http://ardumotive.com
 */
 
#define pinLED1 9
#define pinLED2 10
#define pinLED3 11
#define trimmer A1

#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
Adafruit_PCD8544 display = Adafruit_PCD8544(3,4,5,6,7);

int pwm=255;

void setup() {
  // Put your setup code here, to run once:
  // Define LED pins as outputs:
  pinMode(pinLED1, OUTPUT);
  pinMode(pinLED2, OUTPUT);
  pinMode(pinLED3, OUTPUT);
  
  display.begin();
  display.setContrast(50);
  display.clearDisplay();   // clears the screen and buffer
}

void loop() {
  // put your main code here, to run repeatedly:
  pwm = map(analogRead(A1),0,1024,0,255);
  display.setTextSize(1);
  display.println("PWM Fade:");
  display.println("");
  display.setTextSize(3);
  display.println(pwm);
  display.display();
  fadeLeds(pwm);
  display.clearDisplay();   // clears the screen and buffer
}

void fadeLeds(int pwm){
  analogWrite(pinLED1, pwm);
  analogWrite(pinLED2, pwm);
  analogWrite(pinLED3, pwm);
}