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<!DOCTYPE html>
<html>
<head>
<title>Morse Code Decoder</title>
<style>
body {
font-family: sans-serif;
display: flex;
flex-direction: column;
align-items: center;
padding: 20px;
}
.container {
width: 80%;
max-width: 600px;
}
textarea, input {
width: 100%;
padding: 8px;
margin-bottom: 10px;
box-sizing: border-box;
}
button {
padding: 10px 20px;
background-color: #4CAF50;
color: white;
border: none;
cursor: pointer;
}
button:hover {
background-color: #3e8e41;
}
#led {
width: 50px;
height: 50px;
border-radius: 50%;
background-color: gray;
margin-top: 10px;
}
.alphabet-container {
display: flex;
flex-wrap: wrap;
justify-content: center;
margin-top: 20px;
}
.alphabet-letter {
width: 30px;
height: 30px;
display: flex;
align-items: center;
justify-content: center;
border: 1px solid #ccc;
margin: 5px;
cursor: pointer;
user-select: none; /* Prevent text selection on click */
}
.alphabet-letter:hover {
background-color: #f0f0f0;
}
#status {
margin-top: 10px;
font-style: italic;
}
</style>
</head>
<body>
<div class="container">
<h1>Morse Code Decoder</h1>
<label for="morseInput">Morse Code Input:</label>
<textarea id="morseInput" rows="4"></textarea>
<button onclick="decodeMorse()">Decode</button>
<label for="decodedText">Decoded Text:</label>
<textarea id="decodedText" rows="4" readonly></textarea>
<h2>LED Output</h2>
<div id="led"></div>
<h2>Alphabet Input</h2>
<div class="alphabet-container" id="alphabetContainer">
</div>
<p id="status">Ready</p>
</div>
<script>
const MORSE_CODE_DICT = {
'A': '.-', 'B': '-...', 'C': '-.-.', 'D': '-..', 'E': '.', 'F': '..-.',
'G': '--.', 'H': '....', 'I': '..', 'J': '.---', 'K': '-.-', 'L': '.-..',
'M': '--', 'N': '-.', 'O': '---', 'P': '.--.', 'Q': '--.-', 'R': '.-.',
'S': '...', 'T': '-', 'U': '..-', 'V': '...-', 'W': '.--', 'X': '-..-',
'Y': '-.--', 'Z': '--..', '1': '.----', '2': '..---', '3': '...--',
'4': '....-', '5': '.....', '6': '-....', '7': '--...', '8': '---..',
'9': '----.', '0': '-----', ', ': '--..--', '.': '.-.-.-', '?': '..--..',
'/': '-..-.', '-': '-....-', '(': '-.--.', ')': '-.--.-'
};
const dotDuration = 200; // milliseconds
const dashDuration = dotDuration * 3;
const spaceDuration = dotDuration * 7;
const letterSpaceDuration = dotDuration * 3;
const morseInput = document.getElementById("morseInput");
const decodedText = document.getElementById("decodedText");
const led = document.getElementById("led");
const alphabetContainer = document.getElementById("alphabetContainer");
const status = document.getElementById("status");
// Generate alphabet buttons
const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for (let i = 0; i < alphabet.length; i++) {
const letter = alphabet[i];
const letterDiv = document.createElement("div");
letterDiv.classList.add("alphabet-letter");
letterDiv.textContent = letter;
letterDiv.addEventListener("click", function() {
if (MORSE_CODE_DICT[letter]) {
morseInput.value += MORSE_CODE_DICT[letter] + " "; // Add space after each letter
} else {
alert("Morse Code not found for this Character")
}
});
alphabetContainer.appendChild(letterDiv);
}
function decodeMorse() {
const morseCode = morseInput.value.toUpperCase().trim();
status.textContent = "Decoding..."; // Start decoding
if (!morseCode) {
status.textContent = "Please enter Morse code.";
return;
}
try {
const decoded = morseToText(morseCode);
decodedText.value = decoded;
status.textContent = "Decoding Complete" // Success!
displayLED(morseCode);
} catch (error) {
decodedText.value = error; // Display Error
status.textContent = `Error: ${error}`;
turnOffLED(); // Turn off led
}
}
function morseToText(morseCode) {
morseCode = morseCode.replace("/", " / "); // Handle word separators
const words = morseCode.split(" / ");
let text = "";
for (const word of words) {
const letters = word.split(" ");
for (const letter of letters) {
let found = false;
for (const key in MORSE_CODE_DICT) {
if (MORSE_CODE_DICT[key] === letter) {
text += key;
found = true;
break;
}
}
if (!found && letter) {
throw `Invalid Morse code: ${letter}`; // Throw exception for non found letters
}
}
text += " ";
}
return text.trim();
}
function displayLED(morseCode) {
let i = 0;
function animate() {
if (i < morseCode.length) {
const symbol = morseCode[i];
if (symbol === '.') {
turnOnLED();
setTimeout(() => {
turnOffLED();
setTimeout(() => {
i++;
animate();
}, dotDuration);
}, dotDuration);
} else if (symbol === '-') {
turnOnLED();
setTimeout(() => {
turnOffLED();
setTimeout(() => {
i++;
animate();
}, dotDuration);
}, dashDuration);
} else if (symbol === ' ') {
setTimeout(() => {
i++;
animate();
}, letterSpaceDuration);
}
else if (symbol === '/') {
setTimeout(() => {
i++;
animate();
}, spaceDuration);
}
} else {
turnOffLED();
}
}
animate();
}
function turnOnLED() {
led.style.backgroundColor = "yellow";
}
function turnOffLED() {
led.style.backgroundColor = "gray";
}
</script>
</body>
</html> |