Simple RGB LED Code
int redLedPin = 10;
int greenLedPin = 9;
int blueLedPin = 11;
void setup() {
pinMode(redLedPin, OUTPUT);
pinMode(greenLedPin, OUTPUT);
pinMode(blueLedPin, OUTPUT);
}
void loop() {
analogWrite(blueLedPin, 255);
analogWrite(greenLedPin, 80);
analogWrite(redLedPin, 255);
delay(500);
}
LED RGB Code with a colour change loop
/*
Adafruit Arduino – Lesson 3. RGB LED
*/
int redPin = 11;
int greenPin = 10;
int bluePin = 9;
void setup()
{
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
}
void loop()
{
setColor(255, 0, 0); // red
delay(50);
setColor(0, 255, 0); // green
delay(50);
setColor(0, 0, 255); // blue
delay(50);
setColor(255, 255, 0); // yellow
delay(50);
setColor(80, 0, 80); // purple
delay(50);
setColor(0, 255, 255); // aqua
delay(50);
}
void setColor(int red, int green, int blue)
{
analogWrite(redPin, red);
analogWrite(greenPin, green);
analogWrite(bluePin, blue);
}
Frequencies for Musical Notes
https://pages.mtu.edu/~suits/notefreqs.html
Simple Tone – Play once
For this project try to design a piece of music. You will need to work out how long you will play each of the note types, and how long the space between each note will be.
Code:
const int buzzer = 9; //buzzer to arduino pin 9
void setup(){
pinMode(buzzer, OUTPUT); // Set buzzer – pin 9 as an output
tone(buzzer, 500); // Send 1KHz sound signal…
delay(1000); // …for 1 sec
noTone(buzzer); // Stop sound…
delay(500); // …for 1sec
tone(buzzer, 250); // Send 1KHz sound signal…
delay(1000); // …for 1 sec
noTone(buzzer); // Stop sound…
delay(1000); // …for 1sec
}
void loop(){
}
Twinkle Twinkle
int speakerPin = 11;
int length = 15; // the number of notes
//twinkle twinkle little star
char notes[] = “ccggaag ffeeddc ggffeed ggffeed ccggaag ffeeddc “; // a space represents a rest
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;
void playTone(int tone, int duration) {
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) {
char names[] = { ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘a’, ‘b’, ‘C’ };
int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
// play the tone corresponding to the note name
for (int i = 0; i < 8; i++) {
if (names[i] == note) {
playTone(tones[i], duration);
}
}
}
void setup() {
pinMode(speakerPin, OUTPUT);
}
void loop() {
for (int i = 0; i < length; i++) {
if (notes[i] == ‘ ‘) {
delay(beats[i] * tempo); // rest
} else {
playNote(notes[i], beats[i] * tempo);
}
// pause between notes
delay(tempo / 2);
}
}