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<!DOCTYPE html>
<html>
<head>
<title>MT3608 SEPIC Voltage Calculator</title>
<style>
body {
font-family: Arial, sans-serif;
background-color: #f0f0f0;
}
.container {
max-width: 400px;
margin: 40px auto;
padding: 20px;
background-color: #fff;
border: 1px solid #ddd;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.form-group {
margin-bottom: 20px;
}
.form-group label {
display: block;
margin-bottom: 10px;
}
.form-group select {
width: 100%;
padding: 10px;
margin-bottom: 10px;
border: 1px solid #ccc;
border-radius: 5px;
}
.button {
background-color: #4CAF50;
color: #fff;
padding: 10px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
}
.button:hover {
background-color: #3e8e41;
}
#result {
margin-top: 20px;
font-size: 24px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="container">
<h1>MT3608 SEPIC Voltage Calculator</h1>
<p>This calculator is based on the design by <a href="https://github.com/wagiminator/Power-Boards/tree/master/SEPIC_MT3608" target="_blank">WAGIMINATOR</a>.</p>
<form>
<div class="form-group">
<label for="r1">R1 (Ohms):</label>
<select id="r1">
<option value="1000">1KΩ</option>
<option value="1200">1K2Ω</option>
<option value="1500">1K5Ω</option>
<option value="1800">1K8Ω</option>
<option value="2200">2K2Ω</option>
<option value="2700">2K7Ω</option>
<option value="3300">3K3Ω</option>
<option value="3900">3K9Ω</option>
<option value="4700">4K7Ω</option>
<option value="5100">5K1Ω</option>
<option value="5600">5K6Ω</option>
<option value="6800">6K8Ω</option>
<option value="8200">8K2Ω</option>
<option value="10000">10KΩ</option>
<option value="12000">12KΩ</option>
<option value="15000">15KΩ</option>
<option value="18000">18KΩ</option>
<option value="22000">22KΩ</option>
<option value="27000">27KΩ</option>
<option value="33000">33KΩ</option>
<option value="39000">39KΩ</option>
<option value="47000">47KΩ</option>
<option value="51000">51KΩ</option>
<option value="56000">56KΩ</option>
<option value="68000">68KΩ</option>
<option value="82000">82KΩ</option>
<option value="100000">100KΩ</option>
<option value="120000">120KΩ</option>
<option value="150000">150KΩ</option>
<option value="180000">180KΩ</option>
<option value="220000">220KΩ</option>
<option value="270000">270KΩ</option>
<option value="330000">330KΩ</option>
<option value="390000">390KΩ</option>
<option value="470000">470KΩ</option>
<option value="510000">510KΩ</option>
<option value="560000">560KΩ</option>
<option value="680000">680KΩ</option>
<option value="820000">820KΩ</option>
<option value="1000000">1MΩ</option>
<option value="1200000">1M2Ω</option>
<option value="1500000">1M5Ω</option>
<option value="1800000">1M8Ω</option>
<option value="2200000">2M2Ω</option>
<option value="2700000">2M7Ω</option>
<option value="3300000">3M3Ω</option>
<option value="3900000">3M9Ω</option>
<option value="4700000">4M7Ω</option>
<option value="5100000">5M1Ω</option>
<option value="5600000">5M6Ω</option>
<option value="6800000">6M8Ω</option>
<option value="8200000">8M2Ω</option>
<option value="10000000">10MΩ</option>
<!-- ... -->
</select>
</div>
<div class="form-group">
<label for="r2">R2 (Ohms):</label>
<select id="r2">
<option value="1000">1KΩ</option>
<option value="1200">1K2Ω</option>
<option value="1500">1K5Ω</option>
<option value="1800">1K8Ω</option>
<option value="2200">2K2Ω</option>
<option value="2700">2K7Ω</option>
<option value="3300">3K3Ω</option>
<option value="3900">3K9Ω</option>
<option value="4700">4K7Ω</option>
<option value="5100">5K1Ω</option>
<option value="5600">5K6Ω</option>
<option value="6800">6K8Ω</option>
<option value="8200">8K2Ω</option>
<option value="10000">10KΩ</option>
<option value="12000">12KΩ</option>
<option value="15000">15KΩ</option>
<option value="18000">18KΩ</option>
<option value="22000">22KΩ</option>
<option value="27000">27KΩ</option>
<option value="33000">33KΩ</option>
<option value="39000">39KΩ</option>
<option value="47000">47KΩ</option>
<option value="51000">51KΩ</option>
<option value="56000">56KΩ</option>
<option value="68000">68KΩ</option>
<option value="82000">82KΩ</option>
<option value="100000">100KΩ</option>
<option value="120000">120KΩ</option>
<option value="150000">150KΩ</option>
<option value="180000">180KΩ</option>
<option value="220000">220KΩ</option>
<option value="270000">270KΩ</option>
<option value="330000">330KΩ</option>
<option value="390000">390KΩ</option>
<option value="470000">470KΩ</option>
<option value="510000">510KΩ</option>
<option value="560000">560KΩ</option>
<option value="680000">680KΩ</option>
<option value="820000">820KΩ</option>
<option value="1000000">1MΩ</option>
<option value="1200000">1M2Ω</option>
<option value="1500000">1M5Ω</option>
<option value="1800000">1M8Ω</option>
<option value="2200000">2M2Ω</option>
<option value="2700000">2M7Ω</option>
<option value="3300000">3M3Ω</option>
<option value="3900000">3M9Ω</option>
<option value="4700000">4M7Ω</option>
<option value="5100000">5M1Ω</option>
<option value="5600000">5M6Ω</option>
<option value="6800000">6M8Ω</option>
<option value="8200000">8M2Ω</option>
<option value="10000000">10MΩ</option>
<!-- ... -->
</select>
</div>
<div class="form-group">
<label for="vref">Voltage Reference (V):</label>
<select id="vref">
<option value="0.6">0.6</option>
<option value="0.7">0.7</option>
<option value="0.8">0.8</option>
<option value="0.9">0.9</option>
</select>
</div>
<button type="button" class="button" onclick="calculateVoltage()">Calculate Voltage</button>
<button type="button" class="button" onclick="findCombinations()">Find Combinations</button>
<p id="result"></p>
<p id="combinations"></p>
</form>
</div>
<script>
const resistanceValues = [
1000, 1200, 1500, 1800, 2200, 2700, 3300, 3900, 4700, 5100, 5600, 6800, 8200, 10000, 12000, 15000, 18000, 22000, 27000, 33000, 39000, 47000, 51000, 56000, 68000, 82000,
100000, 120000, 150000, 180000, 220000, 270000, 330000, 390000, 470000, 510000, 560000, 680000, 820000, 1000000, 1200000, 1500000, 1800000, 2200000, 2700000, 3300000, 3900000, 4700000, 5100000, 5600000, 6800000, 8200000, 10000000
];
// Function to calculate output voltage
function calculateVoltage() {
// Get values of R1, R2, and Vref from the dropdown menus
const r1 = parseFloat(document.getElementById('r1').value);
const r2 = parseFloat(document.getElementById('r2').value);
const vref = parseFloat(document.getElementById('vref').value);
// Calculate output voltage using the formula
const vout = vref * ((r1 + r2) / r1);
// Display result in the paragraph
document.getElementById('result').innerHTML = `The output voltage is: ${vout.toFixed(2)} V`;
}
// Function to find combinations of R1 and R2 that meet the voltage requirements
function findCombinations() {
// Get minimum and maximum voltage values from user input
const vmin = parseFloat(prompt("Enter minimum voltage (V):"));
const vmax = parseFloat(prompt("Enter maximum voltage (V):"));
// Get Vref value from the dropdown menu
const vref = parseFloat(document.getElementById('vref').value);
// Initialize array of combinations
const combinations = [];
// Loop to iterate over R1 and R2 values
for (let i = 0; i < resistanceValues.length; i++) {
for (let j = 0; j < resistanceValues.length; j++) {
const r1 = resistanceValues[i];
const r2 = resistanceValues[j];
// Calculate output voltage using the formula
const vout = vref * ((r1 + r2) / r1);
// Check if voltage is within the required range
if (vout >= vmin && vout <= vmax) {
// Add combination to the array
combinations.push(`Vout: ${vout.toFixed(2)}V, R1: ${formatResistance(r1)}Ω, R2: ${formatResistance(r2)}Ω`);
}
}
}
// After generating all combinations
combinations.sort((a, b) => {
// Extract voltages from each combination string
const voutA = parseFloat(a.split('Vout: ')[1]);
const voutB = parseFloat(b.split('Vout: ')[1]);
// Compare voltages and sort in ascending order
return voutA - voutB;
});
// Display combinations in paragraph
document.getElementById('combinations').innerHTML = combinations.join('<br>');
}
// Function to format resistance
function formatResistance(resistance) {
if (resistance >= 1000000) {
return parseFloat((resistance / 1000000).toFixed(2)).toString() + 'M';
} else if (resistance >= 1000) {
return parseFloat((resistance / 1000).toFixed(2)).toString() + 'K';
} else {
return resistance.toString();
}
}
</script>
</body>
</html>Metadata
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