Another little snippet – Feel free to use.
A nice little led resistor calculator for use in Confluence.
Settings:
No macro body
Template code:
## @noparams
<table borderwidth=0 style=’border-collapse: true;’>
<tr>
<td colspan=3 style=’text-align: center;’>
<font style=’weight: bold; font-size: 24px;’>Formula</font>
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<br>
<br>
</td>
</tr>
<tr>
<td></td>
<td></td>
<td>V<sub>s</sub> <input placeholder=”Supply V” onchange=”ledCalc()” style=’width: 90px;’ name=”Vs” id=”Vs” type=”number”> –
V<sub>f</sub> <input placeholder=”Forward V” onchange=”ledCalc()” style=’width: 90px;’ name=”Vf” id=”Vf” type=”number”><br></td>
</tr>
<tr>
<td>R <input name=”R” id=”R” style=’width: 90px;’ type=”number” disabled=true> Ohm</td>
<td>=</td>
<td><hr></td>
</tr>
<tr>
<td>P <input name=”R” id=”P” style=’width: 90px;’ type=”number” disabled=true> W</td>
<td></td>
<td style=’text-align: center;’>I <input placeholder=”Max I” onchange=”ledCalc()” style=’width: 90px;’ name=”I” id=”I” type=”number”><br></td>
</tr>
</table>
<script>
function ledCalc() {
let vs = document.getElementById(‘Vs’).value ;
let vf = document.getElementById(‘Vf’).value ;
let I = document.getElementById(‘I’).value ;
let ro = (vs – vf) / I ;
let po = (vs – vf) * I ;
document.getElementById(‘P’).value = po.toFixed(3) ;
document.getElementById(‘R’).value = ro.toFixed(0) ;
}
</script>