SOS Morse code with digitalWrite and sound

Code:

void setup() { pinMode(13, OUTPUT); pinMode(8, OUTPUT); } void loop() { digitalWrite(13, HIGH); tone(8,440,300); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(900); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(2400); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,300); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); digitalWrite(13, HIGH); tone(8,440,300); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(300); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,900); digitalWrite(13, HIGH); delay(900); digitalWrite(13, LOW); delay(900); tone(8,440,300); digitalWrite(13, HIGH); delay(300); digitalWrite(13, LOW); delay(2400); }

This code is used for create an SOS message using a LED

First, you stablish the stetup with the value of the pin 13 as an output,

Then you create the setup, which we will use mostly this two commands:DigitalWrite() and delay

There two commands will make the led to activate or deactivate.

On digitalWrite, you must put the pin and if want to be activated "HIGH" or not "LOW"

The delay will select the time that the pin will be ON and OFF

For the SOS Morse code, consult Wikypedia for example for getting knowledge of the letters p atron

Simple rules on Morse Code:

Dots are 1 unit

Lines are 3 units

Space between letters of a word are 3 units

Space between dots and lines of a letter are 1 unit

Space between words are 7 units

For the sound you must add the tone() line behind the HIGH duration leds

With this, you can now create an SOS Morse code using a LED and Arduino