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rccc.html
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<!doctype html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=0.7, maximum-scale=0.7, user-scalable=0"/>
<meta charset="utf-8"/>
<title>Resistor Colour Code Challenge</title>
<style>
* {
transition: background-color .2s ease-in, border-color .2s ease-in;
}
body {
text-align: center;
margin-top: 40px;
font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;
}
input[type='number'] {
-moz-appearance:textfield;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
-webkit-appearance: none;
}
#resistor {
margin: 0 auto;
width: 340px;
height: 100px;
background-color: #f3da7b;
position: relative;
}
#resistor::before {
content: "";
background-color: #f3da7b;
height: 120px;
width: 100px;
float: left;
border-radius: 20px;
top: -10px;
left: -20px;
position: relative;
}
#resistor::after {
content: "";
background-color: #f3da7b;
height: 120px;
width: 100px;
float: right;
border-radius: 20px;
top: -10px;
right: -20px;
position: relative;
}
#resistor .band {
position: absolute;
height: 100px;
width: 20px;
background-color: black;
z-index: 999;
}
#resistor #band-1 {
left: 40px;
height: 120px;
top: -10px;
}
#resistor #band-2 {
left: 100px;
}
#resistor #band-3 {
left: 160px;
}
#resistor #band-4 {
left: 220px;
}
#resistor #band-5 {
left: 280px;
height: 120px;
top: -10px;
background-color: gold;
background: linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -webkit-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -moz-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -o-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
}
#resistor #legs {
position: absolute;
width: 500px;
left: -80px;
top: 40px;
height: 20px;
background-color: lightgrey;
z-index: -1;
}
#resistor #value {
position: absolute;
width: 100%;
z-index: 99999;
font-size: 36px;
top: 108px;
display: none;
}
#resistor #value.correct {
color: #25c125;
}
#resistor #value.incorrect {
color: #e80606;
}
#answer {
margin-top: 60px;
}
#answer .digit.correct {
border-color: #25c125;
}
#answer .digit.incorrect {
border-color: #e80606;
}
#answer .digit, #answer #result {
border: 1px solid #ccc;
width: 50px;
height: 50px;
border-radius: 4px;
margin-right: 10px;
padding: 0;
text-align: center;
font-size: 20px;
}
#answer #result {
box-sizing: border-box;
border: 1px solid #ddd;
background-color: #ddd;
display: inline-block;
margin: 0;
padding: 0;
position: relative;
top: -13px;
font-family: "Times", "Times New Roman", "serif", "sans-serif", "EmojiSymbols"
}
#answer #result.incorrect {
background-color: #e80606;
border-color: #e80606;
}
#answer #result.correct {
background-color: #25c125;
border-color: #25c125;
}
#answer #result.correct::before {
content: "✔";
color: white;
font-size: 25px;
position: absolute;
top: 9px;
left: 14px;
}
#answer #result.incorrect::before {
content: "✕";
color: white;
font-size: 25px;
position: absolute;
top: 9px;
left: 14px;
}
#controls {
margin-top: 30px;
}
#cheatsheet {
margin-top: 30px;
display: none;
}
#cheatsheet table {
border: 1px solid #ccc;
border-collapse: collapse;
margin: 0 auto;
}
#cheatsheet table td {
padding: 5px;
text-align: center;
border: 1px solid #333;
}
#cheatsheet table tbody tr td.irrelevant {
background: repeating-linear-gradient(
45deg,
#ffcccc,
#ffcccc 10px,
#ffffff 10px,
#ffffff 20px
);
}
#cheatsheet table tbody tr:nth-child(1) {
background-color: black;
color: white;
}
#cheatsheet table tbody tr:nth-child(1) td {
border-color: black;
}
#cheatsheet table tbody tr:nth-child(2) {
background-color: saddlebrown;
color: white;
}
#cheatsheet table tbody tr:nth-child(3) {
background-color: red;
}
#cheatsheet table tbody tr:nth-child(4) {
background-color: orange;
}
#cheatsheet table tbody tr:nth-child(5) {
background-color: yellow;
}
#cheatsheet table tbody tr:nth-child(6) {
background-color: green;
}
#cheatsheet table tbody tr:nth-child(7) {
background-color: blue;
color: white;
}
#cheatsheet table tbody tr:nth-child(8) {
background-color: violet;
}
#cheatsheet table tbody tr:nth-child(9) {
background-color: grey;
}
#cheatsheet table tbody tr:nth-child(11) {
background-color: gold;
background: linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -webkit-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -moz-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
background: -o-linear-gradient(top, rgba(213,173,109,1) 0%, rgba(213,173,109,1) 26%, rgba(226,186,120,1) 35%, rgba(163,126,67,1) 45%, rgba(145,112,59,1) 61%, rgba(213,173,109,1) 100%);
}
#cheatsheet table tbody tr:nth-child(12) {
background-color: silver;
background: linear-gradient(top, rgba(213,213,213,1) 0%, rgba(213,213,213,1) 26%, rgba(226,226,226,1) 35%, rgba(163,163,163,1) 45%, rgba(145,145,145,1) 61%, rgba(213,213,213,1) 100%);
background: -webkit-linear-gradient(top, rgba(213,213,213,1) 0%, rgba(213,213,213,1) 26%, rgba(226,226,226,1) 35%, rgba(163,163,163,1) 45%, rgba(145,145,145,1) 61%, rgba(213,213,213,1) 100%);
background: -moz-linear-gradient(top, rgba(213,213,213,1) 0%, rgba(213,213,213,1) 26%, rgba(226,226,226,1) 35%, rgba(163,163,163,1) 45%, rgba(145,145,145,1) 61%, rgba(213,213,213,1) 100%);
background: -o-linear-gradient(top, rgba(213,213,213,1) 0%, rgba(213,213,213,1) 26%, rgba(226,226,226,1) 35%, rgba(163,163,163,1) 45%, rgba(145,145,145,1) 61%, rgba(213,213,213,1) 100%);
}
#settings {
margin: 0 auto;
margin-top: 30px;
display: none;
text-align: left;
}
#settings #waittime {
width: 30px;
text-align: center;
}
#scoreboard {
margin: 0 auto;
margin-top: 30px;
}
#scoreboard #score {
display: inline-block;
padding: 10px;
margin-right: 20px;
background-color: #efefef;
font-size: 32px;
min-width: 50px;
}
#scoreboard #score::before {
content: "SCORE";
font-weight: bold;
font-size: 12px;
display: block;
}
#scoreboard #high {
display: inline-block;
padding: 10px;
background-color: #efefef;
font-size: 32px;
min-width: 50px;
}
#scoreboard #high::before {
content: "HIGH";
font-weight: bold;
font-size: 12px;
display: block;
}
#footer {
font-size: 10px;
color: #333;
margin-top: 30px;
}
#footer a {
color: #888;
text-decoration: none;
}
#footer a:hover {
text-decoration: underline;
}
h1, h2 {
color: #333;
}
h2 {
font-size: 14px;
font-weight: normal;
margin: 0 auto;
width: 480px;
margin-bottom: 60px;
}
</style>
</head>
<html>
<h1>Resistor Colour Code Challenge</h1>
<h2>Learn resistor colour codes quickly and easily. Just enter the number corresponding to each colour band (use the cheat sheet if you're stuck.)</h2>
<div id="resistor">
<div id="legs"></div>
<div class="band" id="band-1"></div>
<div class="band" id="band-2"></div>
<div class="band" id="band-3"></div>
<div class="band" id="band-4"></div>
<div class="band" id="band-5"></div>
<div id="value"></div>
</div>
<div id="answer">
<input type="number" onfocus="this.select();" onkeypress="return event.charCode >= 48 && event.charCode <= 57" class="digit" data-digit="1" id="digit-1"><input type="number" onfocus="this.select();" onkeypress="return event.charCode >= 48 && event.charCode <= 57" class="digit" data-digit="2" id="digit-2"><input type="number" onfocus="this.select();" onkeypress="return event.charCode >= 48 && event.charCode <= 57" class="digit" data-digit="3" id="digit-3"><input type="number" onfocus="this.select();" onkeypress="return event.charCode >= 48 && event.charCode <= 57" class="digit" data-digit="4" id="digit-4"><div id="result"> </div>
</div>
<div id="scoreboard">
<div id="score">
<span id="scorespan">0</span>
</div>
<div id="high">
<span id="highspan">0</span>
</div>
</div>
<div id="controls">
<button id="toggle-cheats">Cheat Sheet</button> <button id="toggle-settings">Settings</button>
</div>
<div id="cheatsheet">
<table>
<thead><tr><td>Color</td><td>1st Band</td><td>2nd Band</td><td>3rd Band</td><td>Multiplier</td><td>Tolerance</td></tr></thead>
<tbody>
<tr><td>Black</td><td>0</td><td>0</td><td>0</td><td>1Ω</td><td class="irrelevant"></td></tr>
<tr><td>Brown</td><td>1</td><td>1</td><td>1</td><td>10Ω</td><td>± 1% (F)</td></tr>
<tr><td>Red</td><td>2</td><td>2</td><td>2</td><td>100Ω</td><td>± 2% (G)</td></tr>
<tr><td>Orange</td><td>3</td><td>3</td><td>3</td><td>1kΩ</td><td class="irrelevant"></td></tr>
<tr><td>Yellow</td><td>4</td><td>4</td><td>4</td><td>10kΩ</td><td class="irrelevant"></td></tr>
<tr><td>Green</td><td>5</td><td>5</td><td>5</td><td>100kΩ</td><td>± 0.5% (D)</td></tr>
<tr><td>Blue</td><td>6</td><td>6</td><td>6</td><td>1MΩ</td><td>± 0.25% (C)</td></tr>
<tr><td>Violet</td><td>7</td><td>7</td><td>7</td><td>10MΩ</td><td>± 0.10% (B)</td></tr>
<tr><td>Grey</td><td>8</td><td>8</td><td>8</td><td class="irrelevant"></td><td>± 0.05%</td></tr>
<tr><td>White</td><td>9</td><td>9</td><td>9</td><td class="irrelevant"></td><td class="irrelevant"></td></tr>
<tr><td>Gold</td><td class="irrelevant"></td><td class="irrelevant"></td><td class="irrelevant"></td><td>0.1Ω</td><td>± 5% (J)</td></tr>
<tr><td>Silver</td><td class="irrelevant"></td><td class="irrelevant"></td><td class="irrelevant"></td><td>0.01Ω</td><td>± 10% (K)</td></tr>
</tbody>
</table>
</div>
<div id="settings">
· <label for="playsounds"><input type="checkbox" id="playsounds" checked=checked> Play sounds</label><br>
· Wait <input type="text" value="2" maxlength=3 id="waittime" onfocus="this.select();" onkeypress="return event.charCode >= 48 && event.charCode <= 57"> seconds before resetting game<br>
· <button id="reset">Reset</button> high score
</div>
<div id="footer">
<a href="https://github.com/sdmtr/Resistor-Colour-Code-Challenge">Source on Github</a> | <a href="https://github.com/sdmtr">Other stuff on Github</a>
</div>
<script>
(function() {
var $ = function(id) { return document.getElementById(id); };
var waittime = (window.localStorage.getItem('waittime') === null) ? 2 : window.localStorage.getItem('waittime');
$('waittime').value = waittime;
var sounds = (window.localStorage.getItem('sounds') === "false") ? false : true;
$('playsounds').checked = sounds;
var score = 0, streak = 0;
var high = window.localStorage.getItem('high') || 0;
$('highspan').innerText = high;
var colors = ['black', 'saddlebrown', 'red', 'orange', 'yellow', 'green', 'blue', 'violet', 'grey', 'white', 'gold', 'silver'];
var series = [1.00 , 1.05 , 1.10, 1.15 , 1.21 , 1.27, 1.33 , 1.40 , 1.47, 1.54 , 1.62 , 1.69, 1.78 , 1.87 , 1.96, 2.05 ,
2.15 , 2.26, 2.37 , 2.49 , 2.61, 2.74 , 2.87 , 3.01, 3.16 , 3.32 , 3.48, 3.65 , 3.83 , 4.02, 4.22 , 4.42 ,
4.64, 4.87 , 5.11 , 5.36, 5.62 , 5.90 , 6.19, 6.49 , 6.81 , 7.15, 7.50 , 7.87 , 8.25, 8.66 , 9.09 , 9.53 ]; //E48 Series
var band1, band2, band3, band4;
var digits = document.getElementsByClassName('digit');
var handleInput = function(e) {
var digit = this.getAttribute("data-digit");
var value = this.value;
if ((digit < 4) && value) digits[digit].focus();
if ((digit == 4) && value) {
document.activeElement.blur();
$('digit-1').className += ($('digit-1').value == band1) ? ' correct' : ' incorrect'
$('digit-2').className += ($('digit-2').value == band2) ? ' correct' : ' incorrect'
$('digit-3').className += ($('digit-3').value == band3) ? ' correct' : ' incorrect'
$('digit-4').className += ($('digit-4').value == band4) ? ' correct' : ' incorrect'
if (document.getElementsByClassName('incorrect').length) {
$('value').className = 'incorrect';
$('result').className += " incorrect";
if (sounds) {
note(249,100,'triangle');
note(209,100,'triangle');
}
streak = 0;
score = 0;
} else {
$('value').className = 'correct';
$('result').className += " correct";
if (sounds) {
note(987,100,'sine');
note(1245,100,'sine');
}
score++;
streak++
if (streak > high) high = streak;
window.localStorage.setItem('high', high);
}
setTimeout(function() { reset(); }, waittime * 1000);
$('scorespan').innerText = score;
$('highspan').innerText = high;
$('value').style.display = 'block';
}
};
for (var i=0; i<digits.length; i++) {
digits[i].addEventListener('input', handleInput, false);
digits[i].addEventListener('keydown', function (e) {
// prevent tabbing out of the input (but not shift-tabbing) if the input is empty
var isShift = !!window.event.shiftKey;
var value = this.value;
if (e.which == 9 && !isShift && !value) e.preventDefault();
});
}
$('toggle-cheats').addEventListener('click', function() {
$('cheatsheet').style.display = ($('cheatsheet').style.display == 'block') ? 'none' : 'block';
$('settings').style.display = 'none';
}, false);
$('toggle-settings').addEventListener('click', function() {
$('settings').style.display = ($('settings').style.display == 'inline-block') ? 'none' : 'inline-block';
$('cheatsheet').style.display = 'none';
}, false);
$('playsounds').addEventListener('change', function() {
sounds = this.checked;
window.localStorage.setItem('sounds', this.checked);
}, false);
$('waittime').addEventListener('blur', function() {
waittime = parseInt(this.value);
window.localStorage.setItem('waittime', waittime);
}, false);
$('reset').addEventListener('click', function() {
high = 0;
window.localStorage.setItem('high', 0);
$('highspan').innerText = high;
}, false);
// let's do this thing
generateCode();
function reset() {
for (var i=0; i<digits.length; i++) {
digits[i].className="digit";
digits[i].value = '';
}
$('result').className = "";
generateCode();
}
function generateCode() {
var power = Math.round(Math.random()*5) + 2;
var value = Math.round(series[Math.floor(Math.random()*series.length)] * Math.pow(10, power));
band1 = +(''+value)[0];
band2 = +(''+value)[1];
band3 = +(''+value)[2];
band4 = power - 2;
$('band-1').style.backgroundColor = colors[band1];
$('band-2').style.backgroundColor = colors[band2];
$('band-3').style.backgroundColor = colors[band3];
$('band-4').style.backgroundColor = colors[band4];
$('value').style.display = 'none';
$('value').className = 'none';
$('value').innerText = formatResistance(value);
$('digit-1').focus();
}
function formatResistance(value, precision) {
if (value == 0) return "0Ω";
var divisions = 1000;
var precision = precision || 1;
var units = ["","k","M"];
var f = Math.floor(Math.log(value)/Math.log(divisions));
return parseFloat((value / Math.pow(divisions,f)).toFixed(precision)) + units[f] + "Ω";
}
var audio = new (window.AudioContext || window.webkitAudioContext)();
function note(f, d, w) {
var oscillator = audio.createOscillator();
var gain = audio.createGain();
gain.gain.value = 0.1;
oscillator.connect(gain);
gain.connect(audio.destination);
oscillator.type = w;
oscillator.frequency.value = f;
oscillator.start();
setTimeout(function() { oscillator.stop(); }, d);
}
})();
</script>
</html>
</html>