component
IN-S42ATUW
Public Unreviewedby AravK
Inolux Corporation · Top View SMD LED · 0402 (1.0 × 0.5mm) · InGaN
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<title>IN-S42ATUW — Component Characterization</title>
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<span style="color:var(--text-muted);font-size:12px;margin-right:8px">Full page:</span>
<code style="color:var(--accent);font-size:11px;background:var(--elevated);padding:4px 8px;border-radius:4px;user-select:all">https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/IN-S42ATUW.html</code>
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<div class="header">
<div class="header-top">
<div class="brand">Adom</div>
<div class="vsep"></div>
<div class="crumb">Components › LEDs › 0402</div>
</div>
<h1>IN-S42ATUW — <span class="val">White</span></h1>
<div class="subtitle">Inolux Corporation · Top View SMD LED · 0402 (1.0 × 0.5mm) · InGaN</div>
<div class="tags">
<span class="tag pkg">0402</span>
<span class="tag mfr">Inolux</span>
<span class="tag series">IN-S42AT</span>
<span class="tag rohs">RoHS</span>
<span class="tag app">White LED</span>
</div>
</div>
<div class="container">
<!-- Key Specs -->
<div class="section">
<div class="spec-cards">
<div class="spec-card highlight">
<div class="sc-label">Chromaticity</div>
<div class="sc-value">CIE</div>
<div class="sc-detail">x=0.295, y=0.3</div>
</div>
<div class="spec-card">
<div class="sc-label">Luminous Intensity</div>
<div class="sc-value">600mcd</div>
<div class="sc-detail">@ 20mA</div>
</div>
<div class="spec-card">
<div class="sc-label">Forward Voltage</div>
<div class="sc-value">3.1V</div>
<div class="sc-detail">max 4.0V</div>
</div>
<div class="spec-card">
<div class="sc-label">Forward Current</div>
<div class="sc-value">25mA</div>
<div class="sc-detail">20mA typical</div>
</div>
<div class="spec-card">
<div class="sc-label">Viewing Angle</div>
<div class="sc-value">130°</div>
<div class="sc-detail">2θ½</div>
</div>
<div class="spec-card">
<div class="sc-label">Power Dissipation</div>
<div class="sc-value">100mW</div>
<div class="sc-detail">max rated</div>
</div>
</div>
</div>
<div class="grid-2">
<!-- Left column -->
<div>
<!-- Electrical Characteristics -->
<div class="section">
<h2 class="section-title">Electrical Characteristics</h2>
<div class="card">
<table class="detail-table">
<tr><td>Forward Voltage (typ)</td><td>3.1V @ 20mA</td></tr>
<tr><td>Forward Voltage (max)</td><td>4.0V @ 20mA</td></tr>
<tr><td>Reverse Voltage (max)</td><td>5V</td></tr>
<tr><td>Forward Current (max)</td><td>25mA</td></tr>
<tr><td>Peak Forward Current</td><td>100mA (1/10, 0.1ms)</td></tr>
<tr><td>Power Dissipation</td><td>100mW</td></tr>
<tr><td>Chromaticity (CIE x)</td><td>0.295</td></tr>
<tr><td>Chromaticity (CIE y)</td><td>0.3</td></tr>
<tr><td>Luminous Intensity</td><td>600 mcd @ 20mA</td></tr>
<tr><td>Viewing Angle (2θ½)</td><td>130°</td></tr>
<tr><td>Material</td><td>InGaN</td></tr>
<tr><td>Lens Type</td><td>Clear</td></tr>
</table>
</div>
</div>
<!-- Operating Conditions -->
<div class="section">
<h2 class="section-title">Operating Conditions</h2>
<div class="card">
<table class="detail-table">
<tr><td>Operating Temp</td><td>−30°C to +80°C</td></tr>
<tr><td>Storage Temp</td><td>−40°C to +85°C</td></tr>
<tr><td>ESD Sensitivity</td><td>InGaN — ESD precautions required</td></tr>
<tr><td>Polarity</td><td>Cathode marked on package</td></tr>
</table>
<div style="margin-top:10px;padding:8px 12px;background:rgba(248,81,73,0.08);border:1px solid rgba(248,81,73,0.2);border-radius:6px;font-size:11px;color:var(--red)">
⚠ ESD Sensitive Device — InGaN LEDs require proper ESD precautions during handling and assembly. Use grounded wrist straps and ESD-safe workstations.
</div>
</div>
</div>
</div>
<!-- Right column -->
<div>
<!-- Package Drawing -->
<div class="section">
<h2 class="section-title">Package & Dimensions</h2>
<div class="card">
<div class="pkg-drawing">
<svg width="100%" height="200" viewBox="0 0 500 200">
<!-- Top view -->
<text x="120" y="14" fill="#8b949e" font-size="10" text-anchor="middle">Top View</text>
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<rect x="92" y="38" width="36" height="37" rx="1" fill="#E8E8E840" stroke="#E8E8E880" stroke-width="0.8"/>
<path d="M110,47 Q125,35 135,47" stroke="#E8E8E899" stroke-width="0.6" fill="none"/>
<text x="168" y="18" fill="#E8E8E8" font-size="9" text-anchor="middle">K (cathode)</text>
<text x="68" y="18" fill="#8b949e" font-size="9" text-anchor="middle">A</text>
<line x1="55" y1="102" x2="185" y2="102" stroke="#484f58" stroke-width="0.5"/>
<line x1="55" y1="98" x2="55" y2="106" stroke="#484f58" stroke-width="0.5"/>
<line x1="185" y1="98" x2="185" y2="106" stroke="#484f58" stroke-width="0.5"/>
<text x="120" y="118" fill="#e6edf3" font-size="10" text-anchor="middle">1.0 ± 0.1</text>
<line x1="195" y1="24" x2="195" y2="89" stroke="#484f58" stroke-width="0.5"/>
<line x1="191" y1="24" x2="199" y2="24" stroke="#484f58" stroke-width="0.5"/>
<line x1="191" y1="89" x2="199" y2="89" stroke="#484f58" stroke-width="0.5"/>
<text x="215" y="60" fill="#e6edf3" font-size="10">0.5 ± 0.1</text>
<!-- Side view -->
<text x="380" y="14" fill="#8b949e" font-size="10" text-anchor="middle">Side View</text>
<rect x="315" y="40" width="130" height="38" rx="2" fill="#1c2128" stroke="#30363d" stroke-width="1.5"/>
<path d="M320,40 Q380,30 445,40" stroke="#E8E8E880" stroke-width="1.5" fill="#E8E8E814"/>
<rect x="315" y="40" width="20" height="38" rx="1" fill="#E8E8E826" stroke="#E8E8E8" stroke-width="1"/>
<rect x="425" y="40" width="20" height="38" rx="1" fill="#E8E8E826" stroke="#E8E8E8" stroke-width="1"/>
<line x1="455" y1="30" x2="455" y2="78" stroke="#484f58" stroke-width="0.5"/>
<line x1="451" y1="30" x2="459" y2="30" stroke="#484f58" stroke-width="0.5"/>
<line x1="451" y1="78" x2="459" y2="78" stroke="#484f58" stroke-width="0.5"/>
<text x="465" y="58" fill="#e6edf3" font-size="10">0.45 ± 0.1</text>
<text x="120" y="145" fill="#8b949e" font-size="10" text-anchor="middle">0402 (1005 metric)</text>
<text x="380" y="100" fill="#8b949e" font-size="10" text-anchor="middle">Clear lens · InGaN</text>
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<text x="250" y="176" fill="#E8E8E8" font-size="10" text-anchor="middle">⚠ Polarized — cathode mark on package indicates negative terminal</text>
</svg>
</div>
</div>
</div>
<!-- Land Pattern -->
<div class="section">
<h2 class="section-title">Recommended Land Pattern</h2>
<div class="card">
<table class="detail-table">
<tr><td>Pad Width</td><td>0.4 ± 0.1mm</td></tr>
<tr><td>Pad Height</td><td>0.6 ± 0.1mm</td></tr>
<tr><td>Pad Spacing (center-to-center)</td><td>0.6 ± 0.1mm</td></tr>
<tr><td>Polarity</td><td>Cathode marked on PCB</td></tr>
</table>
</div>
</div>
</div>
</div>
<!-- Color Swatch -->
<div class="section">
<h2 class="section-title">Emission Color</h2>
<div class="card color-swatch">
<div class="swatch-block" style="background: linear-gradient(135deg, #E8E8E8, #FFFAF0); box-shadow: 0 4px 24px rgba(255,255,255,0.3); display:flex; align-items:center; justify-content:center;">
<span style="font-size:28px;font-weight:700;font-family:'Familjen Grotesk',sans-serif;color:#333;text-shadow:0 2px 8px rgba(0,0,0,0.5)">White</span>
</div>
<div class="swatch-label" style="color:#E8E8E8">Cool White — CIE x=0.295, y=0.3</div>
<div class="swatch-detail">Blue die + yellow phosphor (InGaN) · Broadband emission · CSS approximation: #F5F5DC</div>
</div>
</div>
<!-- Spectral Distribution -->
<div class="section">
<h2 class="section-title">Spectral Distribution</h2>
<div class="chart-wrap">
<h3>Emission Spectrum — Relative Intensity vs. Wavelength</h3>
<svg id="spectral-chart" width="100%" height="280" viewBox="0 0 700 280">
<rect x="60" y="20" width="600" height="200" fill="#0d1117" rx="4"/>
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<line x1="60" y1="20" x2="60" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="170" x2="660" y2="170" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
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<line x1="60" y1="70" x2="660" y2="70" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="20" x2="660" y2="20" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="180" y1="20" x2="180" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="300" y1="20" x2="300" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="420" y1="20" x2="420" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="540" y1="20" x2="540" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
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<!-- Blue die peak -->
<circle cx="-90" cy="80" r="4" fill="#4169E1" opacity="0.9"/>
<line x1="-90" y1="80" x2="-90" y2="220" stroke="#4169E1" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<text x="-90" y="238" fill="#4169E1" font-size="10" text-anchor="middle">450nm</text>
<!-- Phosphor peak -->
<circle cx="225" cy="20" r="4" fill="#E8E8E8" opacity="0.9"/>
<line x1="225" y1="20" x2="225" y2="220" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<text x="225" y="248" fill="#E8E8E8" font-size="10" text-anchor="middle">555nm</text>
<!-- Broad emission label -->
<text x="420" y="116" fill="#8b949e" font-size="9">Broad phosphor emission</text>
<text x="55" y="224" fill="#484f58" font-size="9" text-anchor="end">0%</text>
<text x="55" y="174" fill="#484f58" font-size="9" text-anchor="end">25%</text>
<text x="55" y="124" fill="#484f58" font-size="9" text-anchor="end">50%</text>
<text x="55" y="74" fill="#484f58" font-size="9" text-anchor="end">75%</text>
<text x="55" y="24" fill="#484f58" font-size="9" text-anchor="end">100%</text>
<text x="12" y="124" fill="#484f58" font-size="9" text-anchor="middle" transform="rotate(-90,12,124)">Relative Intensity</text>
<text x="60" y="255" fill="#484f58" font-size="9" text-anchor="middle">500</text>
<text x="180" y="255" fill="#484f58" font-size="9" text-anchor="middle">540</text>
<text x="300" y="255" fill="#484f58" font-size="9" text-anchor="middle">580</text>
<text x="420" y="255" fill="#484f58" font-size="9" text-anchor="middle">620</text>
<text x="540" y="255" fill="#484f58" font-size="9" text-anchor="middle">660</text>
<text x="660" y="255" fill="#484f58" font-size="9" text-anchor="middle">700</text>
<text x="360" y="272" fill="#484f58" font-size="9" text-anchor="middle">Wavelength (nm)</text>
</svg>
<div class="chart-note">White LED emission from InGaN blue die (~450nm) combined with yellow phosphor conversion (~555nm peak). The broad spectral output produces cool white light (CIE x=0.295, y=0.30) with high CRI potential.</div>
</div>
</div>
<!-- IV Curve -->
<div class="section">
<h2 class="section-title">Forward Current vs. Forward Voltage</h2>
<div class="chart-wrap">
<h3>IV Characteristic — the essential curve for circuit design</h3>
<svg id="iv-chart" width="100%" height="280" viewBox="0 0 700 280">
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<line x1="60" y1="20" x2="60" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="170" x2="660" y2="170" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="120" x2="660" y2="120" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="70" x2="660" y2="70" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="20" x2="660" y2="20" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="180" y1="20" x2="180" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="300" y1="20" x2="300" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="420" y1="20" x2="420" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="540" y1="20" x2="540" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
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<path d="M60,220 L216,220 L294,220 L341,219 L356,218 L372,216 L387,212 L402,200 L417,180 L432,140 L459,120 L486,100 L513,70 L540,20 L540,220 L60,220 Z" fill="url(#INS42ATUWGrad)" opacity="0.15"/>
<!-- Operating point -->
<circle cx="432" cy="140" r="5" fill="#E8E8E8" opacity="0.9"/>
<line x1="432" y1="140" x2="432" y2="220" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.5"/>
<line x1="60" y1="140" x2="432" y2="140" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.5"/>
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<text x="491" y="139" fill="#E8E8E8" font-size="10" text-anchor="middle">Typ: 3.1V, 20mA</text>
<text x="491" y="149" fill="#8b949e" font-size="8" text-anchor="middle">Operating point</text>
<!-- Max Vf -->
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<text x="540" y="248" fill="#f85149" font-size="9" text-anchor="middle">4.0V max</text>
<!-- Max If -->
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<text x="100" y="114" fill="#f85149" font-size="9">25mA max</text>
<text x="55" y="224" fill="#484f58" font-size="9" text-anchor="end">0</text>
<text x="55" y="174" fill="#484f58" font-size="9" text-anchor="end">12.5</text>
<text x="55" y="124" fill="#484f58" font-size="9" text-anchor="end">25</text>
<text x="55" y="74" fill="#484f58" font-size="9" text-anchor="end">37.5</text>
<text x="55" y="24" fill="#484f58" font-size="9" text-anchor="end">50</text>
<text x="12" y="124" fill="#484f58" font-size="9" text-anchor="middle" transform="rotate(-90,12,124)">Forward Current (mA)</text>
<text x="60" y="255" fill="#484f58" font-size="9" text-anchor="middle">0.0</text>
<text x="180" y="255" fill="#484f58" font-size="9" text-anchor="middle">1.0</text>
<text x="300" y="255" fill="#484f58" font-size="9" text-anchor="middle">2.0</text>
<text x="420" y="255" fill="#484f58" font-size="9" text-anchor="middle">3.0</text>
<text x="540" y="255" fill="#484f58" font-size="9" text-anchor="middle">4.0</text>
<text x="660" y="255" fill="#484f58" font-size="9" text-anchor="middle">5.0</text>
<text x="360" y="272" fill="#484f58" font-size="9" text-anchor="middle">Forward Voltage (V)</text>
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<div class="chart-note">Characteristic exponential IV curve for an InGaN white LED. Near-zero current until threshold (~2.6V), then steep rise. Design point: 3.1V typical at 20mA. Never exceed 4.0V forward or 25mA continuous.</div>
</div>
</div>
<!-- Current Derating -->
<div class="section">
<h2 class="section-title">Forward Current Derating</h2>
<div class="chart-wrap">
<h3>Maximum Forward Current vs. Ambient Temperature</h3>
<svg id="derating-chart" width="100%" height="280" viewBox="0 0 700 280">
<rect x="60" y="20" width="600" height="200" fill="#0d1117" rx="4"/>
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<line x1="60" y1="20" x2="60" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="170" x2="660" y2="170" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="120" x2="660" y2="120" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="70" x2="660" y2="70" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="180" y1="20" x2="180" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="300" y1="20" x2="300" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="420" y1="20" x2="420" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="540" y1="20" x2="540" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<path d="M60,20 L210,20" stroke="#E8E8E8" stroke-width="2.5" fill="none"/>
<path d="M210,20 L540,153" stroke="#E8E8E8" stroke-width="2.5" fill="none"/>
<path d="M540,153 L705,220" stroke="#E8E8E8" stroke-width="2.5" fill="none" stroke-dasharray="4,3"/>
<path d="M60,20 L210,20 L540,153 L705,220 L60,220 Z" fill="url(#INS42ATUWGrad)" opacity="0.12"/>
<circle cx="210" cy="20" r="4" fill="#E8E8E8" opacity="0.9"/>
<text x="210" y="40" fill="#E8E8E8" font-size="10" text-anchor="middle">30mA @ 25°C</text>
<circle cx="540" cy="153" r="4" fill="#E8E8E8" opacity="0.9"/>
<text x="540" y="144" fill="#E8E8E8" font-size="10" text-anchor="middle">10mA @ 80°C</text>
<rect x="200" y="100" width="110" height="20" rx="4" fill="rgba(63,185,80,0.12)"/>
<text x="255" y="114" fill="#3fb950" font-size="10" text-anchor="middle">Safe operating</text>
<text x="55" y="224" fill="#484f58" font-size="9" text-anchor="end">0</text>
<text x="55" y="174" fill="#484f58" font-size="9" text-anchor="end">7.5</text>
<text x="55" y="124" fill="#484f58" font-size="9" text-anchor="end">15</text>
<text x="55" y="74" fill="#484f58" font-size="9" text-anchor="end">22.5</text>
<text x="55" y="24" fill="#484f58" font-size="9" text-anchor="end">30</text>
<text x="12" y="124" fill="#484f58" font-size="9" text-anchor="middle" transform="rotate(-90,12,124)">Max If (mA)</text>
<text x="60" y="255" fill="#484f58" font-size="9" text-anchor="middle">0</text>
<text x="210" y="255" fill="#484f58" font-size="9" text-anchor="middle">25</text>
<text x="360" y="255" fill="#484f58" font-size="9" text-anchor="middle">50</text>
<text x="540" y="255" fill="#484f58" font-size="9" text-anchor="middle">80</text>
<text x="660" y="255" fill="#484f58" font-size="9" text-anchor="middle">100</text>
<text x="360" y="272" fill="#484f58" font-size="9" text-anchor="middle">Ambient Temperature (°C)</text>
</svg>
<div class="chart-note">InGaN LEDs are more thermally stable than AlInGaP types. At 80°C ambient, derate to 10mA. Still requires thermal management in enclosed or high-temperature applications.</div>
</div>
</div>
<!-- Luminous Intensity vs Current -->
<div class="section">
<h2 class="section-title">Luminous Intensity vs. Forward Current</h2>
<div class="chart-wrap">
<h3>Relative Brightness (normalized at 20mA)</h3>
<svg id="brightness-current-chart" width="100%" height="280" viewBox="0 0 700 280">
<rect x="60" y="20" width="600" height="200" fill="#0d1117" rx="4"/>
<line x1="60" y1="220" x2="660" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="20" x2="60" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="170" x2="660" y2="170" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="120" x2="660" y2="120" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="70" x2="660" y2="70" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="180" y1="20" x2="180" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="300" y1="20" x2="300" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="420" y1="20" x2="420" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="540" y1="20" x2="540" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<path d="M60,220 Q120,168 180,155 Q240,135 300,120 Q360,106 420,95 Q480,78 540,64 Q600,52 660,40"
stroke="#E8E8E8" stroke-width="2.5" fill="none"/>
<path d="M60,220 L660,20" stroke="#484f58" stroke-width="1" stroke-dasharray="5,4" opacity="0.4"/>
<text x="600" y="50" fill="#484f58" font-size="9">Linear</text>
<circle cx="300" cy="120" r="5" fill="#E8E8E8" opacity="0.9"/>
<line x1="60" y1="120" x2="300" y2="120" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<line x1="300" y1="120" x2="300" y2="220" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<text x="310" y="114" fill="#E8E8E8" font-size="10">1.0 @ 20mA</text>
<text x="55" y="224" fill="#484f58" font-size="9" text-anchor="end">0</text>
<text x="55" y="174" fill="#484f58" font-size="9" text-anchor="end">0.5</text>
<text x="55" y="124" fill="#484f58" font-size="9" text-anchor="end">1.0</text>
<text x="55" y="74" fill="#484f58" font-size="9" text-anchor="end">1.5</text>
<text x="55" y="24" fill="#484f58" font-size="9" text-anchor="end">2.0</text>
<text x="12" y="124" fill="#484f58" font-size="9" text-anchor="middle" transform="rotate(-90,12,124)">Relative Brightness</text>
<text x="60" y="255" fill="#484f58" font-size="9" text-anchor="middle">0</text>
<text x="180" y="255" fill="#484f58" font-size="9" text-anchor="middle">10</text>
<text x="300" y="255" fill="#484f58" font-size="9" text-anchor="middle">20</text>
<text x="420" y="255" fill="#484f58" font-size="9" text-anchor="middle">30</text>
<text x="540" y="255" fill="#484f58" font-size="9" text-anchor="middle">40</text>
<text x="660" y="255" fill="#484f58" font-size="9" text-anchor="middle">50</text>
<text x="360" y="272" fill="#484f58" font-size="9" text-anchor="middle">Forward Current (mA)</text>
</svg>
<div class="chart-note">Brightness increases sublinearly with current. Doubling the current from 20mA to 40mA yields only ~55% more light, not 100%. This means diminishing returns at higher drive currents — optimize for efficiency at or below 20mA.</div>
</div>
</div>
<!-- Brightness vs Temperature -->
<div class="section">
<h2 class="section-title">Luminous Intensity vs. Temperature</h2>
<div class="chart-wrap">
<h3>Relative Brightness vs. Ambient Temperature (normalized at 25°C)</h3>
<svg id="brightness-temp-chart" width="100%" height="280" viewBox="0 0 700 280">
<rect x="60" y="20" width="600" height="200" fill="#0d1117" rx="4"/>
<line x1="60" y1="220" x2="660" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="20" x2="60" y2="220" stroke="#21262d" stroke-width="1"/>
<line x1="60" y1="170" x2="660" y2="170" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="120" x2="660" y2="120" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="60" y1="70" x2="660" y2="70" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="180" y1="20" x2="180" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="300" y1="20" x2="300" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="420" y1="20" x2="420" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<line x1="540" y1="20" x2="540" y2="220" stroke="#21262d" stroke-width="0.5" stroke-dasharray="4,4"/>
<path d="M60,95 L120,100 L180,104 L240,109 L300,113 L390,120 L450,123 L510,127 L570,130 L630,133 L660,135" stroke="#E8E8E8" stroke-width="2.5" fill="none"/>
<circle cx="390" cy="120" r="5" fill="#E8E8E8" opacity="0.9"/>
<line x1="60" y1="120" x2="390" y2="120" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<line x1="390" y1="120" x2="390" y2="220" stroke="#E8E8E8" stroke-width="0.5" stroke-dasharray="3,3" opacity="0.4"/>
<text x="400" y="114" fill="#E8E8E8" font-size="10">1.0 @ 25°C</text>
<text x="100" y="62" fill="#58a6ff" font-size="9">Brighter when cold</text>
<text x="570" y="165" fill="#f85149" font-size="9">Dimmer when hot</text>
<text x="55" y="224" fill="#484f58" font-size="9" text-anchor="end">0</text>
<text x="55" y="174" fill="#484f58" font-size="9" text-anchor="end">0.5</text>
<text x="55" y="124" fill="#484f58" font-size="9" text-anchor="end">1.0</text>
<text x="55" y="74" fill="#484f58" font-size="9" text-anchor="end">1.5</text>
<text x="55" y="24" fill="#484f58" font-size="9" text-anchor="end">2.0</text>
<text x="12" y="124" fill="#484f58" font-size="9" text-anchor="middle" transform="rotate(-90,12,124)">Relative Brightness</text>
<text x="60" y="255" fill="#484f58" font-size="9" text-anchor="middle">-30</text>
<text x="180" y="255" fill="#484f58" font-size="9" text-anchor="middle">-10</text>
<text x="300" y="255" fill="#484f58" font-size="9" text-anchor="middle">10</text>
<text x="390" y="255" fill="#484f58" font-size="9" text-anchor="middle">25</text>
<text x="540" y="255" fill="#484f58" font-size="9" text-anchor="middle">50</text>
<text x="660" y="255" fill="#484f58" font-size="9" text-anchor="middle">70</text>
<text x="360" y="272" fill="#484f58" font-size="9" text-anchor="middle">Ambient Temperature (°C)</text>
</svg>
<div class="chart-note">InGaN LEDs are more thermally stable than AlInGaP types. At 70°C, expect only ~15% reduction in luminous intensity, compared to ~30% for AlInGaP (red/amber). Still brighter when cold (125% at -30°C).</div>
</div>
</div>
<!-- Resistor Calculator -->
<div class="section">
<h2 class="section-title">LED Resistor Calculator</h2>
<div class="calc-card">
<h3>⚡ Series Resistor Selection</h3>
<div class="calc-inputs">
<div class="calc-field">
<label>Supply Voltage</label>
<input type="number" id="calc-vsupply" value="3.3" step="0.1" min="0">
<div class="unit">Volts</div>
</div>
<div class="calc-field">
<label>Desired Current</label>
<input type="number" id="calc-iled" value="20" step="1" min="0">
<div class="unit">Milliamps</div>
</div>
</div>
<div class="calc-results">
<div class="calc-result">
<div class="cr-label">Calculated Resistor</div>
<div class="cr-value" id="calc-r-exact">10.00 Ω</div>
<div class="cr-detail" id="calc-r-formula">R = (3.3V - 3.1V) / 20mA</div>
</div>
<div class="calc-result">
<div class="cr-label">Nearest E24 Value</div>
<div class="cr-value" id="calc-r-e24">9.10 Ω</div>
<div class="cr-detail" id="calc-r-actual">Actual If = 22.0mA</div>
</div>
<div class="calc-result">
<div class="cr-label">Resistor Power</div>
<div class="cr-value" id="calc-p-resistor">4.4 mW</div>
<div class="cr-detail" id="calc-p-r-detail">P = (V<sub>supply</sub> - V<sub>f</sub>) × I<sub>f</sub></div>
</div>
<div class="calc-result">
<div class="cr-label">LED Power</div>
<div class="cr-value" id="calc-p-led">68.1 mW</div>
<div class="cr-detail" id="calc-p-led-detail">P = V<sub>f</sub> × I<sub>f</sub> (max 100mW)</div>
</div>
</div>
<div class="calc-schematic">
<svg width="400" height="80" viewBox="0 0 400 80" style="max-width:100%">
<text x="20" y="38" fill="#e6edf3" font-size="11" font-family="JetBrains Mono,monospace" id="calc-svg-vsupply">3.3V</text>
<line x1="50" y1="35" x2="90" y2="35" stroke="#e6edf3" stroke-width="1.5"/>
<path d="M90,35 L100,25 L110,45 L120,25 L130,45 L140,25 L150,45 L160,35" stroke="#00b8b0" stroke-width="2" fill="none"/>
<text x="125" y="60" fill="#00b8b0" font-size="10" text-anchor="middle" font-family="JetBrains Mono,monospace" id="calc-svg-r">9.10Ω</text>
<line x1="160" y1="35" x2="210" y2="35" stroke="#e6edf3" stroke-width="1.5"/>
<polygon points="210,22 210,48 240,35" fill="none" stroke="#E8E8E8" stroke-width="2"/>
<line x1="240" y1="22" x2="240" y2="48" stroke="#E8E8E8" stroke-width="2"/>
<line x1="230" y1="18" x2="238" y2="10" stroke="#E8E8E8" stroke-width="1"/>
<line x1="235" y1="22" x2="243" y2="14" stroke="#E8E8E8" stroke-width="1"/>
<polygon points="238,10 234,13 237,14" fill="#E8E8E8"/>
<polygon points="243,14 239,17 242,18" fill="#E8E8E8"/>
<text x="225" y="65" fill="#E8E8E8" font-size="10" text-anchor="middle" font-family="JetBrains Mono,monospace">LED</text>
<line x1="240" y1="35" x2="300" y2="35" stroke="#e6edf3" stroke-width="1.5"/>
<line x1="300" y1="28" x2="300" y2="42" stroke="#e6edf3" stroke-width="1.5"/>
<line x1="290" y1="42" x2="310" y2="42" stroke="#e6edf3" stroke-width="1.5"/>
<line x1="294" y1="47" x2="306" y2="47" stroke="#e6edf3" stroke-width="1.2"/>
<line x1="297" y1="52" x2="303" y2="52" stroke="#e6edf3" stroke-width="0.8"/>
<text x="320" y="42" fill="#8b949e" font-size="10" font-family="JetBrains Mono,monospace">GND</text>
<text x="180" y="26" fill="#8b949e" font-size="9" text-anchor="middle" font-family="JetBrains Mono,monospace" id="calc-svg-if">20mA</text>
<line x1="168" y1="30" x2="192" y2="30" stroke="#8b949e" stroke-width="0.5"/>
<polygon points="192,30 187,27 187,33" fill="#8b949e"/>
</svg>
</div>
</div>
</div>
<!-- Environmental -->
<div class="section">
<h2 class="section-title">Environmental & Handling</h2>
<div class="env-grid">
<div class="env-card">
<div class="env-name">ESD Sensitivity</div>
<div class="env-spec">InGaN — ESD precautions required</div>
<div class="env-detail">Use grounded wrist straps & ESD-safe tools</div>
</div>
<div class="env-card">
<div class="env-name">Operating Temperature</div>
<div class="env-spec">Continuous operation range</div>
<div class="env-detail">−30°C to +80°C</div>
</div>
<div class="env-card">
<div class="env-name">Storage Temperature</div>
<div class="env-spec">Unbiased storage</div>
<div class="env-detail">−40°C to +85°C</div>
</div>
<div class="env-card">
<div class="env-name">Moisture Sensitivity</div>
<div class="env-spec">MSL noted in packaging</div>
<div class="env-detail">Follow J-STD-020 bake requirements</div>
</div>
</div>
</div>
<!-- Symbol, Footprint & 3D --> <!-- Symbol, Footprint & 3D View -->
<div class="section">
<h2 class="section-title">Symbol, Footprint & 3D Model</h2>
<div class="grid-2" style="margin-bottom:12px">
<!-- Interactive SymView -->
<div class="card" style="padding:0;overflow:hidden">
<div style="font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:0.5px;color:var(--text-dim);padding:12px 16px 0">Schematic Symbol</div>
<iframe src="IN-S42ATUW-symview.html" style="width:100%;height:340px;border:none;display:block" allow="fullscreen"></iframe>
</div>
<!-- Interactive FpView -->
<div class="card" style="padding:0;overflow:hidden">
<div style="font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:0.5px;color:var(--text-dim);padding:12px 16px 0">Footprint (0402)</div>
<iframe src="IN-S42ATUW-fpview.html" style="width:100%;height:340px;border:none;display:block" allow="fullscreen"></iframe>
</div>
</div>
<!-- 3D Model -->
<div class="card" style="text-align:center;margin-bottom:12px">
<div style="font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:0.5px;color:var(--text-dim);margin-bottom:12px">3D Model (interactive)</div>
<canvas id="viewer3d" width="600" height="300" style="width:100%;height:300px;border-radius:4px;cursor:grab"></canvas>
<div style="font-size:10px;color:var(--text-dim);margin-top:6px">Click & drag to rotate · Scroll to zoom</div>
</div>
<!-- Download / Export Bar -->
<div class="card" style="display:flex;align-items:center;gap:10px;flex-wrap:wrap">
<span style="font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.5px">Export:</span>
<a class="dl-btn" href="https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/IN-S42ATUW.kicad_sym" download>KiCad Symbol (.kicad_sym)</a>
<a class="dl-btn" href="https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/IN-S42ATUW.kicad_mod" download>KiCad Footprint (.kicad_mod)</a>
<a class="dl-btn" href="https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/IN-S42ATUW.lbr" download>Fusion 360 (.lbr)</a>
<a class="dl-btn" href="https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/IN-S42ATUW.step" download>3D Model (.step)</a>
</div>
</div>
<!-- Pricing -->
<div class="section">
<h2 class="section-title">Pricing & Availability</h2>
<div class="vendor-cards">
<div class="vendor-card recommended">
<div class="vc-name mouser">Mouser Electronics</div>
<div class="vc-price">—</div>
<div class="vc-detail">Check availability</div>
<a class="vc-link" href="https://www.mouser.com/Search/Refine?Keyword=IN-S42ATUW" target="_blank">Search on Mouser →</a>
</div>
<div class="vendor-card">
<div class="vc-name digikey">DigiKey</div>
<div class="vc-price">—</div>
<div class="vc-detail">Check availability</div>
<a class="vc-link" href="https://www.digikey.com/en/products/result?keywords=IN-S42ATUW" target="_blank">Search on DigiKey →</a>
</div>
<div class="vendor-card">
<div class="vc-name jlcpcb">JLCPCB / LCSC</div>
<div class="vc-price">—</div>
<div class="vc-detail">Check availability</div>
</div>
</div>
</div>
<!-- Documents -->
<div class="section">
<h2 class="section-title">Documents</h2>
<div class="card">
<table class="detail-table">
<tr><td>Datasheet</td><td><a href="http://www.inolux-corp.com/datasheet/SMDLED/Mono%20Color%20Top%20View/IN-S42AT%20Series_V1.1.pdf" target="_blank">IN-S42AT Series V1.1 (PDF) →</a></td></tr>
<tr><td>Series</td><td>IN-S42AT</td></tr>
<tr><td>Manufacturer</td><td>Inolux Corporation</td></tr>
</table>
</div>
</div>
<!-- Molecule -->
<div class="section">
<h2 class="section-title">Molecule — Single-Passive Board</h2>
<div class="card" style="padding:0;overflow:hidden;border-radius:8px">
<div style="font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:0.5px;color:var(--text-dim);padding:12px 16px 0">Interactive 3D Board Viewer</div>
<iframe src="https://wiki-ufypy5dpx93o.adom.cloud/static/libraries/in-s42atuw/tsci-viewer/molecule-viewer/index.html"
style="width:100%;height:500px;border:none;border-radius:0 0 8px 8px;display:block"
allow="fullscreen"></iframe>
</div>
<div style="font-size:11px;color:var(--text-dim);margin-top:8px;text-align:center">
Orbit: click & drag · Zoom: scroll · Inspect: click a component · X-ray: toggle in toolbar
</div>
</div>
<div class="source">
IN-S42ATUW characterization · Data from Inolux IN-S42AT Series V1.1 datasheet + adom-parts-search · 2026-06-03
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/examples/js/pmrem/PMREMGenerator.js"></script>
<script>
(function() {
// ==================== 3D Viewer — IN-S42ATUW (0402 LED, white) ====================
var canvas = document.getElementById('viewer3d');
if (canvas && window.THREE) {
var scene = new THREE.Scene();
var renderer = new THREE.WebGLRenderer({ canvas: canvas, antialias: true, alpha: true, logarithmicDepthBuffer: true });
renderer.setSize(canvas.width, canvas.height);
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
renderer.outputEncoding = THREE.sRGBEncoding;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 1.2;
renderer.physicallyCorrectLights = true;
canvas.style.background = 'linear-gradient(180deg, #5a6b7e 0%, #2a3340 100%)';
var camera = new THREE.PerspectiveCamera(35, canvas.width / canvas.height, 0.01, 1000);
var pmremGen = new THREE.PMREMGenerator(renderer);
pmremGen.compileEquirectangularShader();
var envScene = new THREE.Scene();
envScene.background = new THREE.Color(0x3a4550);
var envLight1 = new THREE.DirectionalLight(0xffffff, 2);
envLight1.position.set(1, 3, 2);
envScene.add(envLight1);
var envLight2 = new THREE.DirectionalLight(0x8899bb, 1);
envLight2.position.set(-2, 1, -1);
envScene.add(envLight2);
var envRT = pmremGen.fromScene(envScene, 0.04);
scene.environment = envRT.texture;
var hemi = new THREE.HemisphereLight(0xe6edf3, 0xb3a699, 0.5);
scene.add(hemi);
var keyLight = new THREE.DirectionalLight(0xffffff, 1.5);
keyLight.position.set(2, 5, 3);
scene.add(keyLight);
var fillLight = new THREE.DirectionalLight(0x8899aa, 0.5);
fillLight.position.set(-3, 2, -2);
scene.add(fillLight);
var rimLight = new THREE.DirectionalLight(0xffffff, 0.4);
rimLight.position.set(0, -1, 3);
scene.add(rimLight);
var S = 2.5;
var bodyMat = new THREE.MeshStandardMaterial({
color: 0x2a2018, metalness: 0.0, roughness: 0.4
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var lensMat = new THREE.MeshStandardMaterial({
color: 0xF5F5DC, metalness: 0.0, roughness: 0.15,
transparent: true, opacity: 0.7,
emissive: 0xFFFFE0, emissiveIntensity: 0.3
});
var termMat = new THREE.MeshStandardMaterial({
color: 0xc8ccd1, metalness: 1.0, roughness: 0.25,
polygonOffset: true, polygonOffsetFactor: -1, polygonOffsetUnits: -1
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var padMat = new THREE.MeshStandardMaterial({ color: 0xc9a04c, metalness: 1.0, roughness: 0.22 });
var pcbMat = new THREE.MeshStandardMaterial({ color: 0x0a2a0a, metalness: 0.0, roughness: 0.6 });
var cathodeMat = new THREE.MeshStandardMaterial({ color: 0xF5F5DC, emissive: 0xFFFFE0, emissiveIntensity: 0.5, metalness: 0.0, roughness: 0.5 });
var bodyW = 1.0, bodyD = 0.5, bodyH = 0.30;
var lensH = 0.15;
var termW = 0.20;
var innerW = bodyW - termW * 2 + 0.02;
var body = new THREE.Mesh(new THREE.BoxGeometry(innerW*S, bodyH*S, bodyD*S), bodyMat);
body.position.y = bodyH*S/2;
scene.add(body);
var lens = new THREE.Mesh(new THREE.BoxGeometry(bodyW*0.85*S, lensH*S, bodyD*0.85*S), lensMat);
lens.position.y = (bodyH + lensH/2)*S;
scene.add(lens);
function makeTerminal(xSign) {
var group = new THREE.Group();
var front = new THREE.Mesh(new THREE.BoxGeometry(termW*S, bodyH*S, bodyD*S*0.99), termMat);
front.position.set(xSign*(bodyW/2 - termW/2)*S, bodyH*S/2, 0);
group.add(front);
var bot = new THREE.Mesh(new THREE.BoxGeometry((termW+0.03)*S, 0.04*S, bodyD*S*0.99), termMat);
bot.position.set(xSign*(bodyW/2 - termW/2)*S, 0.02*S, 0);
group.add(bot);
return group;
}
scene.add(makeTerminal(-1));
scene.add(makeTerminal(1));
var cathMark = new THREE.Mesh(new THREE.BoxGeometry(0.02*S, 0.02*S, bodyD*0.7*S), cathodeMat);
cathMark.position.set(0.25*S, (bodyH + lensH + 0.02)*S, 0);
scene.add(cathMark);
var pcb = new THREE.Mesh(new THREE.BoxGeometry(10*S, 0.08*S, 8*S), pcbMat);
pcb.position.y = -0.04*S;
scene.add(pcb);
var pad1 = new THREE.Mesh(new THREE.BoxGeometry(0.4*S, 0.025*S, 0.6*S), padMat);
pad1.position.set(-0.3*S, 0.005*S, 0);
scene.add(pad1);
var pad2 = new THREE.Mesh(new THREE.BoxGeometry(0.4*S, 0.025*S, 0.6*S), padMat);
pad2.position.set(0.3*S, 0.005*S, 0);
scene.add(pad2);
var gridMat2 = new THREE.LineBasicMaterial({ color: 0x0d3d0d, transparent: true, opacity: 0.3 });
for (var i = -8; i <= 8; i++) {
var pts1 = [new THREE.Vector3(i*0.4*S, 0.045*S, -4*S), new THREE.Vector3(i*0.4*S, 0.045*S, 4*S)];
scene.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(pts1), gridMat2));
var pts2 = [new THREE.Vector3(-4*S, 0.045*S, i*0.4*S), new THREE.Vector3(4*S, 0.045*S, i*0.4*S)];
scene.add(new THREE.Line(new THREE.BufferGeometry().setFromPoints(pts2), gridMat2));
}
var isDragging = false, prevX = 0, prevY = 0;
var theta = Math.PI/4, phi = Math.PI/5.5, radius = 5.0;
var target = new THREE.Vector3(0, 0.4, 0);
function updateCamera() {
camera.position.x = radius * Math.sin(theta) * Math.cos(phi);
camera.position.y = radius * Math.sin(phi) + target.y;
camera.position.z = radius * Math.cos(theta) * Math.cos(phi);
camera.lookAt(target);
}
updateCamera();
canvas.addEventListener('mousedown', function(e) { isDragging = true; prevX = e.clientX; prevY = e.clientY; canvas.style.cursor = 'grabbing'; });
window.addEventListener('mouseup', function() { isDragging = false; canvas.style.cursor = 'grab'; });
canvas.addEventListener('mousemove', function(e) {
if (!isDragging) return;
theta -= (e.clientX - prevX) * 0.008;
phi = Math.max(0.05, Math.min(Math.PI/2.2, phi + (e.clientY - prevY) * 0.008));
prevX = e.clientX; prevY = e.clientY;
updateCamera();
});
canvas.addEventListener('wheel', function(e) {
e.preventDefault();
radius = Math.max(2, Math.min(12, radius + e.deltaY * 0.004));
updateCamera();
}, { passive: false });
function animate() { requestAnimationFrame(animate); renderer.render(scene, camera); }
animate();
}
// ==================== Chart Tooltip System ====================
function setupChartTooltip(svgId, dataPoints, color, formatX, formatY) {
var svg = document.getElementById(svgId);
if (!svg) return;
var ns = 'http://www.w3.org/2000/svg';
var dot = document.createElementNS(ns, 'circle');
dot.setAttribute('r', '5');
dot.setAttribute('fill', color);
dot.setAttribute('stroke', '#0d1117');
dot.setAttribute('stroke-width', '2');
dot.style.display = 'none';
dot.style.pointerEvents = 'none';
svg.appendChild(dot);
var tipGroup = document.createElementNS(ns, 'g');
tipGroup.style.display = 'none';
tipGroup.style.pointerEvents = 'none';
var tipBg = document.createElementNS(ns, 'rect');
tipBg.setAttribute('rx', '4');
tipBg.setAttribute('fill', '#161b22');
tipBg.setAttribute('stroke', '#30363d');
tipBg.setAttribute('stroke-width', '1');
var tipLine1 = document.createElementNS(ns, 'text');
tipLine1.setAttribute('font-family', 'JetBrains Mono, monospace');
tipLine1.setAttribute('font-size', '10');
tipLine1.setAttribute('fill', '#e6edf3');
var tipLine2 = document.createElementNS(ns, 'text');
tipLine2.setAttribute('font-family', 'JetBrains Mono, monospace');
tipLine2.setAttribute('font-size', '10');
tipLine2.setAttribute('fill', color);
tipGroup.appendChild(tipBg);
tipGroup.appendChild(tipLine1);
tipGroup.appendChild(tipLine2);
svg.appendChild(tipGroup);
var vLine = document.createElementNS(ns, 'line');
vLine.setAttribute('stroke', color);
vLine.setAttribute('stroke-width', '0.5');
vLine.setAttribute('stroke-dasharray', '3,3');
vLine.setAttribute('opacity', '0.5');
vLine.style.display = 'none';
vLine.style.pointerEvents = 'none';
svg.appendChild(vLine);
function lerp(pts, svgX) {
if (svgX <= pts[0].sx) return pts[0];
if (svgX >= pts[pts.length-1].sx) return pts[pts.length-1];
for (var i = 0; i < pts.length - 1; i++) {
if (svgX >= pts[i].sx && svgX <= pts[i+1].sx) {
var t = (svgX - pts[i].sx) / (pts[i+1].sx - pts[i].sx);
return {
sx: svgX,
sy: pts[i].sy + t * (pts[i+1].sy - pts[i].sy),
vx: pts[i].vx + t * (pts[i+1].vx - pts[i].vx),
vy: pts[i].vy + t * (pts[i+1].vy - pts[i].vy),
};
}
}
return pts[0];
}
svg.addEventListener('mousemove', function(e) {
var pt = svg.createSVGPoint();
pt.x = e.clientX;
pt.y = e.clientY;
var svgPt = pt.matrixTransform(svg.getScreenCTM().inverse());
var minX = dataPoints[0].sx;
var maxX = dataPoints[dataPoints.length-1].sx;
if (svgPt.x < minX - 10 || svgPt.x > maxX + 10) {
dot.style.display = 'none';
tipGroup.style.display = 'none';
vLine.style.display = 'none';
return;
}
var p = lerp(dataPoints, svgPt.x);
dot.setAttribute('cx', p.sx);
dot.setAttribute('cy', p.sy);
dot.style.display = '';
vLine.setAttribute('x1', p.sx);
vLine.setAttribute('y1', p.sy);
vLine.setAttribute('x2', p.sx);
vLine.setAttribute('y2', 220);
vLine.style.display = '';
var xLabel = formatX(p.vx);
var yLabel = formatY(p.vy);
tipLine1.textContent = xLabel;
tipLine2.textContent = yLabel;
var tipX = p.sx + 12;
var tipY = p.sy - 28;
var boxW = Math.max(xLabel.length, yLabel.length) * 7 + 16;
var boxH = 32;
var adjustedX = tipX + boxW > 660 ? p.sx - boxW - 12 : tipX;
var adjustedY = tipY < 10 ? p.sy + 12 : tipY;
tipBg.setAttribute('x', adjustedX);
tipBg.setAttribute('y', adjustedY);
tipBg.setAttribute('width', boxW);
tipBg.setAttribute('height', boxH);
tipLine1.setAttribute('x', adjustedX + 8);
tipLine1.setAttribute('y', adjustedY + 13);
tipLine2.setAttribute('x', adjustedX + 8);
tipLine2.setAttribute('y', adjustedY + 26);
tipGroup.style.display = '';
});
svg.addEventListener('mouseleave', function() {
dot.style.display = 'none';
tipGroup.style.display = 'none';
vLine.style.display = 'none';
});
}
// ==================== Spectral Chart ====================
var spectralData = [
{sx:-90, sy:48, vx:450, vy:86.2},
{sx:-81, sy:47, vx:453, vy:86.5},
{sx:-72, sy:51, vx:456, vy:84.4},
{sx:-63, sy:59, vx:459, vy:80.3},
{sx:-54, sy:70, vx:462, vy:74.8},
{sx:-45, sy:83, vx:465, vy:68.7},
{sx:-36, sy:95, vx:468, vy:62.7},
{sx:-27, sy:105, vx:471, vy:57.4},
{sx:-18, sy:113, vx:474, vy:53.3},
{sx:-9, sy:119, vx:477, vy:50.4},
{sx:0, sy:122, vx:480, vy:48.9},
{sx:9, sy:123, vx:483, vy:48.7},
{sx:18, sy:121, vx:486, vy:49.5},
{sx:27, sy:118, vx:489, vy:51.1},
{sx:36, sy:113, vx:492, vy:53.3},
{sx:45, sy:108, vx:495, vy:55.9},
{sx:54, sy:102, vx:498, vy:58.9},
{sx:63, sy:96, vx:501, vy:62.0},
{sx:72, sy:90, vx:504, vy:65.2},
{sx:81, sy:83, vx:507, vy:68.4},
{sx:90, sy:77, vx:510, vy:71.6},
{sx:99, sy:71, vx:513, vy:74.7},
{sx:108, sy:64, vx:516, vy:77.8},
{sx:117, sy:59, vx:519, vy:80.7},
{sx:126, sy:53, vx:522, vy:83.5},
{sx:135, sy:48, vx:525, vy:86.2},
{sx:144, sy:43, vx:528, vy:88.6},
{sx:153, sy:38, vx:531, vy:90.9},
{sx:162, sy:34, vx:534, vy:93.0},
{sx:171, sy:30, vx:537, vy:94.8},
{sx:180, sy:27, vx:540, vy:96.3},
{sx:189, sy:25, vx:543, vy:97.6},
{sx:198, sy:23, vx:546, vy:98.7},
{sx:207, sy:21, vx:549, vy:99.4},
{sx:216, sy:20, vx:552, vy:99.9},
{sx:225, sy:20, vx:555, vy:100.0},
{sx:234, sy:20, vx:558, vy:99.9},
{sx:243, sy:21, vx:561, vy:99.4},
{sx:252, sy:23, vx:564, vy:98.7},
{sx:261, sy:25, vx:567, vy:97.6},
{sx:270, sy:27, vx:570, vy:96.3},
{sx:279, sy:30, vx:573, vy:94.8},
{sx:288, sy:34, vx:576, vy:93.0},
{sx:297, sy:38, vx:579, vy:90.9},
{sx:306, sy:43, vx:582, vy:88.6},
{sx:315, sy:48, vx:585, vy:86.2},
{sx:324, sy:53, vx:588, vy:83.5},
{sx:333, sy:59, vx:591, vy:80.7},
{sx:342, sy:64, vx:594, vy:77.8},
{sx:351, sy:71, vx:597, vy:74.7},
{sx:360, sy:77, vx:600, vy:71.6},
{sx:369, sy:83, vx:603, vy:68.3},
{sx:378, sy:90, vx:606, vy:65.1},
{sx:387, sy:96, vx:609, vy:61.8},
{sx:396, sy:103, vx:612, vy:58.4},
{sx:405, sy:110, vx:615, vy:55.2},
{sx:414, sy:116, vx:618, vy:51.9},
{sx:423, sy:123, vx:621, vy:48.7},
{sx:432, sy:129, vx:624, vy:45.5},
{sx:441, sy:135, vx:627, vy:42.4},
{sx:450, sy:141, vx:630, vy:39.5},
{sx:459, sy:147, vx:633, vy:36.6},
{sx:468, sy:152, vx:636, vy:33.8},
{sx:477, sy:158, vx:639, vy:31.2},
{sx:486, sy:163, vx:642, vy:28.6},
{sx:495, sy:168, vx:645, vy:26.2},
{sx:504, sy:172, vx:648, vy:23.9},
{sx:513, sy:176, vx:651, vy:21.8},
{sx:522, sy:180, vx:654, vy:19.8},
{sx:531, sy:184, vx:657, vy:17.9},
{sx:540, sy:188, vx:660, vy:16.2},
{sx:549, sy:191, vx:663, vy:14.5},
{sx:558, sy:194, vx:666, vy:13.0},
{sx:567, sy:197, vx:669, vy:11.7},
{sx:576, sy:199, vx:672, vy:10.4},
{sx:585, sy:201, vx:675, vy:9.3},
{sx:594, sy:204, vx:678, vy:8.2},
{sx:603, sy:205, vx:681, vy:7.3},
{sx:612, sy:207, vx:684, vy:6.4},
{sx:621, sy:209, vx:687, vy:5.6},
{sx:630, sy:210, vx:690, vy:4.9},
{sx:639, sy:211, vx:693, vy:4.3},
{sx:648, sy:213, vx:696, vy:3.7},
{sx:657, sy:214, vx:699, vy:3.2},
];
setupChartTooltip('spectral-chart', spectralData, '#E8E8E8',
function(x) { return x.toFixed(0) + ' nm'; },
function(y) { return 'Intensity: ' + y.toFixed(1) + '%'; }
);
// ==================== IV Chart ====================
var ivData = [
{sx:60, sy:220, vx:0.00, vy:0.0},
{sx:216, sy:220, vx:1.30, vy:0.0},
{sx:294, sy:220, vx:1.95, vy:0.1},
{sx:341, sy:219, vx:2.34, vy:0.3},
{sx:356, sy:218, vx:2.47, vy:0.5},
{sx:372, sy:216, vx:2.60, vy:1.0},
{sx:387, sy:212, vx:2.73, vy:2.0},
{sx:402, sy:200, vx:2.85, vy:5.0},
{sx:417, sy:180, vx:2.98, vy:10.0},
{sx:432, sy:140, vx:3.10, vy:20.0},
{sx:459, sy:120, vx:3.33, vy:25.0},
{sx:486, sy:100, vx:3.55, vy:30.0},
{sx:513, sy:70, vx:3.77, vy:37.5},
{sx:540, sy:20, vx:4.00, vy:50.0},
];
setupChartTooltip('iv-chart', ivData, '#E8E8E8',
function(x) { return 'Vf = ' + x.toFixed(2) + ' V'; },
function(y) { return 'If = ' + y.toFixed(1) + ' mA'; }
);
// ==================== Derating Chart ====================
var deratingData = [
{sx:60, sy:20, vx:0, vy:30.0},
{sx:210, sy:20, vx:25, vy:30.0},
{sx:240, sy:32, vx:30, vy:28.2},
{sx:270, sy:44, vx:35, vy:26.4},
{sx:300, sy:56, vx:40, vy:24.5},
{sx:330, sy:68, vx:45, vy:22.7},
{sx:360, sy:81, vx:50, vy:20.9},
{sx:390, sy:93, vx:55, vy:19.1},
{sx:420, sy:105, vx:60, vy:17.3},
{sx:450, sy:117, vx:65, vy:15.5},
{sx:480, sy:129, vx:70, vy:13.6},
{sx:510, sy:141, vx:75, vy:11.8},
{sx:540, sy:153, vx:80, vy:10.0},
{sx:705, sy:220, vx:108, vy:0.0},
];
setupChartTooltip('derating-chart', deratingData, '#E8E8E8',
function(x) { return x.toFixed(0) + '\u00b0C'; },
function(y) { return 'Max If = ' + y.toFixed(1) + ' mA'; }
);
// ==================== Brightness vs Current ====================
var brightCurrentData = [
{sx:60, sy:220, vx:0, vy:0},
{sx:120, sy:168, vx:5, vy:0.52},
{sx:180, sy:148, vx:10, vy:0.72},
{sx:240, sy:135, vx:15, vy:0.85},
{sx:300, sy:120, vx:20, vy:1.0},
{sx:360, sy:108, vx:25, vy:1.12},
{sx:420, sy:95, vx:30, vy:1.25},
{sx:540, sy:69, vx:40, vy:1.51},
{sx:660, sy:40, vx:50, vy:1.80},
];
setupChartTooltip('brightness-current-chart', brightCurrentData, '#E8E8E8',
function(x) { return 'If = ' + x.toFixed(0) + ' mA'; },
function(y) { return 'Brightness: ' + y.toFixed(2) + 'x'; }
);
// ==================== Brightness vs Temperature ====================
var brightTempData = [
{sx:60, sy:95, vx:-30, vy:1.25},
{sx:120, sy:100, vx:-20, vy:1.20},
{sx:180, sy:104, vx:-10, vy:1.16},
{sx:240, sy:109, vx:0, vy:1.11},
{sx:300, sy:113, vx:10, vy:1.07},
{sx:390, sy:120, vx:25, vy:1.00},
{sx:450, sy:123, vx:35, vy:0.97},
{sx:510, sy:127, vx:45, vy:0.93},
{sx:570, sy:130, vx:55, vy:0.90},
{sx:630, sy:133, vx:65, vy:0.87},
{sx:660, sy:135, vx:70, vy:0.85},
];
setupChartTooltip('brightness-temp-chart', brightTempData, '#E8E8E8',
function(x) { return x.toFixed(0) + '\u00b0C'; },
function(y) { return 'Brightness: ' + y.toFixed(2) + 'x'; }
);
// ==================== Resistor Calculator ====================
var VF_TYP = 3.1;
var E24 = [10,11,12,13,15,16,18,20,22,24,27,30,33,36,39,43,47,51,56,62,68,75,82,91];
function nearestE24(val) {
if (val <= 0) return 0;
var decade = 1;
while (val >= 100) { val /= 10; decade *= 10; }
while (val < 10) { val *= 10; decade /= 10; }
var best = E24[0], bestDist = Math.abs(val - E24[0]);
for (var i = 1; i < E24.length; i++) {
var d = Math.abs(val - E24[i]);
if (d < bestDist) { bestDist = d; best = E24[i]; }
}
return best * decade;
}
function formatResistance(r) {
if (r >= 1e6) return (r/1e6).toFixed(1) + ' M\u03a9';
if (r >= 1e3) return (r/1e3).toFixed(0) + ' k\u03a9';
if (r >= 100) return r.toFixed(0) + ' \u03a9';
if (r >= 10) return r.toFixed(1) + ' \u03a9';
return r.toFixed(2) + ' \u03a9';
}
function updateCalculator() {
var vSupply = parseFloat(document.getElementById('calc-vsupply').value) || 0;
var iLed = parseFloat(document.getElementById('calc-iled').value) || 0;
var iLedA = iLed / 1000;
var vDrop = vSupply - VF_TYP;
var rExact = vDrop > 0 && iLedA > 0 ? vDrop / iLedA : 0;
var rE24 = nearestE24(rExact);
var iActual = rE24 > 0 ? vDrop / rE24 : 0;
var pResistor = vDrop * iActual;
var pLed = VF_TYP * iActual;
document.getElementById('calc-r-exact').innerHTML = rExact > 0 ? formatResistance(rExact) : '—';
document.getElementById('calc-r-formula').textContent = 'R = (' + vSupply.toFixed(1) + 'V - ' + VF_TYP + 'V) / ' + iLed.toFixed(0) + 'mA';
document.getElementById('calc-r-e24').innerHTML = rE24 > 0 ? formatResistance(rE24) : '—';
document.getElementById('calc-r-actual').textContent = iActual > 0 ? 'Actual If = ' + (iActual * 1000).toFixed(1) + 'mA' : '';
document.getElementById('calc-p-resistor').textContent = pResistor > 0 ? (pResistor * 1000).toFixed(1) + ' mW' : '\u2014';
document.getElementById('calc-p-led').textContent = pLed > 0 ? (pLed * 1000).toFixed(1) + ' mW' : '\u2014';
var svgVs = document.getElementById('calc-svg-vsupply');
if (svgVs) svgVs.textContent = vSupply.toFixed(1) + 'V';
var svgR = document.getElementById('calc-svg-r');
if (svgR) svgR.textContent = rE24 > 0 ? formatResistance(rE24) : '\u2014';
var svgIf = document.getElementById('calc-svg-if');
if (svgIf) svgIf.textContent = iActual > 0 ? (iActual * 1000).toFixed(1) + 'mA' : '';
var pLedEl = document.getElementById('calc-p-led');
if (pLed * 1000 > 100) {
pLedEl.style.color = '#f85149';
} else {
pLedEl.style.color = '';
}
var rExactEl = document.getElementById('calc-r-exact');
if (vDrop <= 0) {
rExactEl.innerHTML = '<span style="color:#f85149">V<sub>supply</sub> too low</span>';
}
}
document.getElementById('calc-vsupply').addEventListener('input', updateCalculator);
document.getElementById('calc-iled').addEventListener('input', updateCalculator);
updateCalculator();
})();
</script>
</div>
</body>
</html>