154 lines
7.6 KiB
HTML
154 lines
7.6 KiB
HTML
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<title>Transistor Stage 0, One Zone</title>
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<style>
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:root{
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--bg:#faf8f4; --ink:#1c1a17; --muted:#6b6459; --card:#fff;
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--line:#3a352e; --red:#c0392b; --grn:#2e7d32; --slate:#5b6b7a;
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--amber:#c98a1a; --rule:#d8d2c7;
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}
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@media (prefers-color-scheme:dark){
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:root{ --bg:#17150f; --ink:#eee7d9; --muted:#a49a88; --card:#211e17;
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--line:#c9c2b4; --red:#e5675a; --grn:#6bbf70; --slate:#8fa3b5;
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--amber:#e0b24e; --rule:#3a352b; }
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}
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:root[data-theme=light]{ --bg:#faf8f4;--ink:#1c1a17;--muted:#6b6459;--card:#fff;
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--line:#3a352e;--red:#c0392b;--grn:#2e7d32;--slate:#5b6b7a;--amber:#c98a1a;--rule:#d8d2c7; }
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:root[data-theme=dark]{ --bg:#17150f;--ink:#eee7d9;--muted:#a49a88;--card:#211e17;
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--line:#c9c2b4;--red:#e5675a;--grn:#6bbf70;--slate:#8fa3b5;--amber:#e0b24e;--rule:#3a352b; }
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body{background:var(--bg);color:var(--ink);
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font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
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margin:0;padding:24px;}
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.wrap{max-width:860px;margin:0 auto;}
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h1{font-size:20px;margin:0 0 2px;}
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.sub{color:var(--muted);margin:0 0 18px;font-size:13px;}
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.card{background:var(--card);border:1px solid var(--rule);border-radius:12px;
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padding:16px;margin-bottom:18px;}
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.scroll{overflow-x:auto;}
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svg{display:block;margin:0 auto;max-width:100%;height:auto;}
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text{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;fill:var(--ink);}
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.lbl{font-size:13px;} .sm{font-size:11px;fill:var(--muted);}
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.wire{stroke:var(--line);stroke-width:2.2;fill:none;}
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.w5{stroke:var(--red);stroke-width:3;fill:none;}
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.wg{stroke:var(--line);stroke-width:3;fill:none;}
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.wsig{stroke:var(--slate);stroke-width:2.2;fill:none;stroke-dasharray:6 4;}
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.node{fill:var(--line);}
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.box{fill:none;stroke:var(--line);stroke-width:2;}
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.chip{fill:var(--card);stroke:var(--line);stroke-width:2;}
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table{border-collapse:collapse;width:100%;font-size:13px;margin-top:4px;}
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th,td{border:1px solid var(--rule);padding:6px 10px;text-align:left;}
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th{background:rgba(128,128,128,.08);}
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code{font-family:ui-monospace,Menlo,monospace;background:rgba(128,128,128,.12);
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padding:1px 5px;border-radius:4px;font-size:.92em;}
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.key{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:8px;}
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.key span{display:inline-flex;align-items:center;gap:6px;}
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.sw{width:22px;height:0;border-top:3px solid;}
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</style>
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<div class="wrap">
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<h1>Transistor Stage 0, one zone (GF / D3)</h1>
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<p class="sub">PN2222 low-side switch · clone ×4 for the other pins · Arduino Uno R3</p>
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<div class="card scroll">
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<svg viewBox="0 0 780 440" role="img" aria-label="One-zone transistor LED driver schematic">
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<!-- +5V rail -->
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<line class="w5" x1="150" y1="40" x2="720" y2="40"/>
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<text class="lbl" x="150" y="30" fill="var(--red)">+5V rail</text>
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<!-- GND rail -->
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<line class="wg" x1="150" y1="400" x2="720" y2="400"/>
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<text class="lbl" x="150" y="422">GND rail</text>
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<!-- Arduino block -->
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<rect class="box" x="30" y="120" width="90" height="200" rx="8"/>
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<text class="lbl" x="52" y="112">Uno</text>
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<!-- pins -->
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<text class="lbl" x="46" y="150">5V</text>
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<line class="w5" x1="120" y1="145" x2="150" y2="145"/>
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<line class="w5" x1="150" y1="145" x2="150" y2="40"/>
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<circle class="node" cx="150" cy="40" r="3.5"/>
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<text class="lbl" x="46" y="205">D3</text>
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<line class="wsig" x1="120" y1="200" x2="300" y2="200"/>
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<text class="lbl" x="46" y="265">D2</text>
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<line class="wire" x1="120" y1="260" x2="600" y2="260"/>
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<text class="lbl" x="40" y="315">GND</text>
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<line class="wg" x1="120" y1="310" x2="150" y2="310"/>
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<line class="wg" x1="150" y1="310" x2="150" y2="400"/>
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<circle class="node" cx="150" cy="400" r="3.5"/>
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<!-- 1k base resistor along D3 line -->
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<rect class="chip" x="300" y="190" width="60" height="20" rx="4"/>
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<text class="sm" x="308" y="204">1kΩ</text>
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<line class="wsig" x1="360" y1="200" x2="470" y2="200"/>
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<!-- PN2222 -->
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<circle class="chip" cx="510" cy="200" r="34"/>
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<text class="lbl" x="486" y="205">Q1</text>
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<text class="sm" x="470" y="250">PN2222</text>
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<!-- base lead -->
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<line class="wire" x1="470" y1="200" x2="476" y2="200"/>
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<text class="sm" x="452" y="188">B</text>
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<!-- collector up -->
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<line class="wire" x1="510" y1="166" x2="510" y2="120"/>
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<text class="sm" x="518" y="150">C</text>
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<!-- emitter down to GND -->
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<line class="wg" x1="510" y1="234" x2="510" y2="400"/>
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<text class="sm" x="518" y="255">E → GND</text>
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<circle class="node" cx="510" cy="400" r="3.5"/>
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<!-- LED + 220 from +5V down to collector -->
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<!-- from +5V rail down -->
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<line class="w5" x1="620" y1="40" x2="620" y2="70"/>
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<circle class="node" cx="620" cy="40" r="3.5"/>
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<!-- LED symbol (triangle + bar) -->
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<polygon points="606,70 634,70 620,96" fill="none" stroke="var(--amber)" stroke-width="2"/>
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<line x1="606" y1="96" x2="634" y2="96" stroke="var(--amber)" stroke-width="2.5"/>
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<text class="sm" x="640" y="86" fill="var(--amber)">LED</text>
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<text class="sm" x="640" y="99">warm white</text>
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<text class="sm" x="560" y="66">anode +</text>
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<line class="wire" x1="620" y1="96" x2="620" y2="112"/>
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<!-- 220 resistor -->
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<rect class="chip" x="590" y="112" width="60" height="20" rx="4"/>
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<text class="sm" x="596" y="126">220Ω</text>
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<!-- down to collector node -->
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<line class="wire" x1="620" y1="132" x2="620" y2="120"/>
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<line class="wire" x1="620" y1="120" x2="510" y2="120"/>
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<circle class="node" cx="510" cy="120" r="3.5"/>
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<!-- button on D2 to GND -->
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<line class="wire" x1="600" y1="260" x2="600" y2="300"/>
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<rect class="box" x="580" y="300" width="40" height="26" rx="4"/>
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<text class="sm" x="588" y="317">BTN</text>
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<line class="wg" x1="600" y1="326" x2="600" y2="400"/>
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<circle class="node" cx="600" cy="400" r="3.5"/>
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<text class="sm" x="628" y="285">D2 → button → GND</text>
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<!-- current path note -->
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<text class="sm" x="150" y="60">current: +5V → LED → 220Ω → collector → (Q1) → emitter → GND</text>
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</svg>
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<div class="key">
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<span><span class="sw" style="border-color:var(--red)"></span>+5V</span>
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<span><span class="sw" style="border-color:var(--line)"></span>GND / wire</span>
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<span><span class="sw" style="border-color:var(--slate);border-top-style:dashed"></span>signal (PWM)</span>
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<span><span class="sw" style="border-color:var(--amber)"></span>LED</span>
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</div>
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</div>
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<div class="card">
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<strong>Then clone the transistor block ×4</strong>, same wiring, just change the Arduino pin:
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<table>
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<tr><th>Zone</th><th>Arduino pin → 1kΩ → base</th><th>Fixtures</th></tr>
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<tr><td>GF_INT</td><td><code>D3</code></td><td>living + kitchen ceilings</td></tr>
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<tr><td>UP_INT</td><td><code>D5</code></td><td>bedrooms + attic</td></tr>
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<tr><td>EXT</td><td><code>D6</code></td><td>porch, entry, deck, balcony</td></tr>
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<tr><td>FIRE</td><td><code>D9</code></td><td>hearth (flicker)</td></tr>
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</table>
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<p class="sm" style="margin:10px 0 0">Each zone shares the same <code>+5V</code> and <code>GND</code> rails.
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Add more LEDs to a zone by putting each one (anode→+5V, cathode→220Ω→collector) in parallel on that transistor.</p>
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</div>
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<div class="card">
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<strong>PN2222 leg order</strong>, flat face toward you, legs down: <code>E · B · C</code> (left→right).
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If nothing lights, swap E↔C, that's the usual culprit and it's harmless.
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</div>
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</div>
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