function convertToSeconds(value, unit) {
switch(unit) {
case “s”: return value;
case “ms”: return value / 1000;
case “us”: return value / 1e6;
case “ns”: return value / 1e9;
default: return 0;
}
}

function calculateDutyCycle() {
const total = parseFloat(document.getElementById(“totalWidth”).value);
const totalUnit = document.getElementById(“totalUnit”).value;
const on = parseFloat(document.getElementById(“onTime”).value);
const onUnit = document.getElementById(“onUnit”).value;
const off = parseFloat(document.getElementById(“offTime”).value);
const offUnit = document.getElementById(“offUnit”).value;

const totalSec = convertToSeconds(total, totalUnit);
let onSec = isNaN(on) ? null : convertToSeconds(on, onUnit);
const offSec = isNaN(off) ? null : convertToSeconds(off, offUnit);

const resultDiv = document.getElementById(“dutyResult”);

if (!total || isNaN(totalSec) || totalSec totalSec || onSec < 0) {
resultDiv.innerHTML = "⚠️ Invalid ON time.";
return;
}

const dutyCycle = (onSec / totalSec) * 100;
resultDiv.innerHTML = `⚙️ Duty Cycle: ${dutyCycle.toFixed(2)}%`;
}

function clearDutyCycle() {
document.getElementById(“totalWidth”).value = “”;
document.getElementById(“onTime”).value = “”;
document.getElementById(“offTime”).value = “”;
document.getElementById(“dutyResult”).innerHTML = “”;
}

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