Published February 8, 2018 © CC BY

Morse Code Transmitter - Light Signal

In this project I made a Morse code transmitter using Arduino and Winform application.

IntermediateShowcase (no instructions)3 hours7,079

Things used in this project

Hardware components

Arduino UNO

LED (generic)

Jumper wires (generic)

Resistor 221 ohm

Software apps and online services

Arduino IDE

Microsoft Visual Studio 2015

Hand tools and fabrication machines

Hot glue gun (generic)

Story

In this project I tried to make a Morse code transmitter with light signal. It was for a University project and I will make the receiver in the next time.

Demo

You only need one LED but I suggest that use at least 3 different color. One of them is for the main message (I mean dot and dash) the other is for the delay to separate the dot and dash to recognize the letters and the last one is for the delay to separate the words.

Morse alphabet

The syntax for Arduino for example for letter A : .`- or X : -`.`.`-

Translate method in C#:

List<string> MorseSting = new List<string>();
       private string MorseToSend;
       private string MorseToShow;
       private string MorseToReady;
void Translate()
       {
           char[] characters = Msg.Text.ToCharArray();
           for (int i = 0; i < characters.Length; i++)
           {
               Console.WriteLine(characters[i]);
           }
           for (int i = 0; i < characters.Length; i++)
           {
               if (characters[i] == 'a' || characters[i] == 'A') { MorseSting.Add(".`-`s`"); }
               if (characters[i] == 'b' || characters[i] == 'B') { MorseSting.Add("-`.`.`.`s`"); }
               if (characters[i] == 'c' || characters[i] == 'C') { MorseSting.Add("-`.`-`.`s`"); }
               if (characters[i] == 'd' || characters[i] == 'D') { MorseSting.Add("-`.`.`s`"); }
               if (characters[i] == 'e' || characters[i] == 'E') { MorseSting.Add(".`s`"); }
               if (characters[i] == 'f' || characters[i] == 'F') { MorseSting.Add(".`.`-`.`s`"); }
               if (characters[i] == 'g' || characters[i] == 'G') { MorseSting.Add("-`-`.`s`"); }
               if (characters[i] == 'h' || characters[i] == 'H') { MorseSting.Add(".`.`.`.`s`"); }
               if (characters[i] == 'i' || characters[i] == 'I') { MorseSting.Add(".`.`s`"); }
               if (characters[i] == 'j' || characters[i] == 'J') { MorseSting.Add(".`-`-`-`s`"); }
               if (characters[i] == 'k' || characters[i] == 'K') { MorseSting.Add("-`.`-`s`"); }
               if (characters[i] == 'l' || characters[i] == 'L') { MorseSting.Add(".`-`.`.`s`"); }
               if (characters[i] == 'm' || characters[i] == 'M') { MorseSting.Add("-`-`s`"); }
               if (characters[i] == 'n' || characters[i] == 'N') { MorseSting.Add("-`.`s`"); }
               if (characters[i] == 'o' || characters[i] == 'O') { MorseSting.Add("-`-`-`s`"); }
               if (characters[i] == 'p' || characters[i] == 'P') { MorseSting.Add(".`-`-`.`s`"); }
               if (characters[i] == 'q' || characters[i] == 'Q') { MorseSting.Add("-`-`.`-`s`"); }
               if (characters[i] == 'r' || characters[i] == 'R') { MorseSting.Add(".`-`.`s`"); }
               if (characters[i] == 's' || characters[i] == 'S') { MorseSting.Add(".`.`.`s`"); }
               if (characters[i] == 't' || characters[i] == 'T') { MorseSting.Add("-`s`"); }
               if (characters[i] == 'u' || characters[i] == 'U') { MorseSting.Add(".`.`-`s`"); }
               if (characters[i] == 'v' || characters[i] == 'V') { MorseSting.Add(".`.`.`-`s`"); }
               if (characters[i] == 'w' || characters[i] == 'W') { MorseSting.Add(".`-`-`s`"); }
               if (characters[i] == 'x' || characters[i] == 'X') { MorseSting.Add("-`.`.`-`s`"); }
               if (characters[i] == 'y' || characters[i] == 'Y') { MorseSting.Add("-`.`-`-`s`"); }
               if (characters[i] == 'z' || characters[i] == 'Z') { MorseSting.Add("-`-`.`.`s`"); }
               if (characters[i] == '1') { MorseSting.Add(".`-`-`-`-`s`"); }
               if (characters[i] == '2') { MorseSting.Add(".`.`-`-`-`s`"); }
               if (characters[i] == '3') { MorseSting.Add(".`.`.`-`-`s`"); }
               if (characters[i] == '4') { MorseSting.Add(".`.`.`.`-`s`"); }
               if (characters[i] == '5') { MorseSting.Add(".`.`.`.`.`s`"); }
               if (characters[i] == '6') { MorseSting.Add("-`.`.`.`.`s`"); }
               if (characters[i] == '7') { MorseSting.Add("-`-`.`.`.`s`"); }
               if (characters[i] == '8') { MorseSting.Add("-`-`-`.`.`s`"); }
               if (characters[i] == '9') { MorseSting.Add("-`-`-`-`.`s`"); }
               if (characters[i] == '0') { MorseSting.Add("-`-`-`-`-`s`"); }
               if (characters[i] == ' ') { MorseSting.Add("/`"); }
           }
           for (int i = 0; i < characters.Length; i++)
           {
               MorseToSend += MorseSting[i];
           }
           MorseToSend += "/";
           MorseToReady = MorseToSend.Replace("`", "");
           MorseToShow = MorseToReady.Replace("s", " ");
           Morse.Text = MorseToShow;
       }

You can download the WinForm application below.

IF YOU HAVE ANY PROBLEM WITH THE PROJECT YOU CAN BE IN TOUCH WITH ME.

Schematics

Code

Arduino Code

int mrs = 7; 
int slsh = 4; 
int spc = 10; 
int ddot=100;
int ddash=500;
void setup() { 
  Serial.begin(9600);
pinMode(mrs, OUTPUT); 
pinMode(slsh, OUTPUT); 
pinMode(spc, OUTPUT); 
}

void loop() { 

}
//////////////////
String Splitter(String data, char separator, int index)
{
    int found = 0;
    int strIndex[] = { 0, -1 };
    int maxIndex = data.length() - 1;
    

    for (int i = 0; i <= maxIndex && found <= index; i++) {
        if (data.charAt(i) == separator || i == maxIndex) {
            found++;
            strIndex[0] = strIndex[1] + 1;
            strIndex[1] = (i == maxIndex) ? i+1 : i;
        }
    }
    return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}
///////////////////////////
void serialEvent (){
  String serialResponse = Serial.readString();
  int _length = serialResponse.length();
  String morse[_length];
  for(int i = 0 ; i <= _length ; i++)
  {
     morse[i] = Splitter(serialResponse, '`', i);
  }
  for (int j = 0 ; j <=_length ; j++)
  {
    if(morse[j]==".")dot();
    else if(morse[j]=="-")dash();
    else if(morse[j]=="/")slash();
    else if(morse[j]=="s")space();
  }Serial.println("End");
  
}
void space ()
{
 // Serial.println("space ");
  digitalWrite(spc, HIGH); 
delay(500); 
digitalWrite(spc, LOW); delay(400);
}
void slash ()
{
//  Serial.println("slash ");
  digitalWrite(slsh, HIGH); 
delay(1600); 
digitalWrite(slsh, LOW); delay(400);
}
void dot ()
{
//  Serial.println("dot ");
  digitalWrite(mrs, HIGH); 
delay(ddot); 
digitalWrite(mrs, LOW); delay(400);
}
void dash ()
{
//  Serial.println("dash ");
  digitalWrite(mrs, HIGH); 
delay(ddash); 
digitalWrite(mrs, LOW); delay(400);
}