151 lines
14 KiB
XML
151 lines
14 KiB
XML
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<title>Branchement sans 74AHCT125 (solution A) : matrice en 4,4 V, Raspberry Pi relié directement</title>
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<text x="60" y="38" font-size="20" fill="#222" text-anchor="start" font-weight="bold">Matrice WS2812B 8 × 32 — vue de dos (côté fils)</text>
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<rect x="60" y="55" width="980" height="245" rx="6" fill="url(#pix)"/>
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<text x="550" y="135" font-size="15" fill="#e6e6e6" text-anchor="middle">les données entrent par DIN et traversent les 256 LED</text>
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<text x="110" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">5V</text>
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<text x="150" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">GND</text>
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<text x="194" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">DOUT</text>
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<text x="490" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">5V</text>
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<text x="550" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">GND</text>
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<text x="880" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">5V</text>
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<text x="910" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">GND</text>
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<text x="940" y="268" font-size="12" fill="#cfcfcf" text-anchor="middle">DIN</text>
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<text x="150" y="390" font-size="14" fill="#555" text-anchor="middle">Sortie DOUT : ne rien brancher</text>
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<text x="150" y="408" font-size="13" fill="#888" text-anchor="middle">(sert à chaîner un 2e panneau)</text>
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<text x="529" y="356" font-size="13" fill="#1f4e9c" text-anchor="middle" font-weight="bold">−</text>
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<text x="474" y="340" font-size="14" fill="#1f4e9c" text-anchor="end" font-weight="bold">Condensateur 1000 µF</text>
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<text x="474" y="358" font-size="13" fill="#1f4e9c" text-anchor="end">bande « − » côté GND (fil noir)</text>
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<text x="474" y="375" font-size="13" fill="#1f4e9c" text-anchor="end">patte + côté 5V (fil rouge)</text>
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<text x="465" y="526" font-size="16" fill="#333" text-anchor="middle" font-weight="bold">Alimentation d'établi</text>
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<text x="398" y="578" font-size="28" fill="#7dff7d" text-anchor="middle" font-weight="bold" font-family="monospace">4.40 V</text>
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<text x="398" y="618" font-size="20" fill="#ffb347" text-anchor="middle" font-family="monospace">3.00 A</text>
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<circle cx="345" cy="672" r="16" fill="#666"/>
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<text x="345" y="702" font-size="11" fill="#555" text-anchor="middle">tension</text>
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<circle cx="420" cy="672" r="16" fill="#666"/>
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<text x="420" y="702" font-size="11" fill="#555" text-anchor="middle">courant</text>
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<circle cx="590" cy="600" r="13" fill="#1a1a1a" stroke="#000" stroke-width="2"/>
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<text x="530" y="637" font-size="15" fill="#d62828" text-anchor="middle" font-weight="bold">+</text>
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<text x="590" y="637" font-size="15" fill="#1a1a1a" text-anchor="middle" font-weight="bold">−</text>
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<text x="560" y="660" font-size="12" fill="#555" text-anchor="middle">bornes de</text>
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<text x="560" y="675" font-size="12" fill="#555" text-anchor="middle">sortie</text>
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<text x="966" y="358" font-size="13" fill="#555" text-anchor="start">connecteur DIN de la matrice</text>
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<text x="966" y="381" font-size="13" fill="#555" text-anchor="start">+ fiche fournie (rouge / blanc / vert)</text>
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<text x="864" y="431" font-size="13" fill="#b00020" text-anchor="end" font-weight="bold">fil rouge : NON branché, isolé (scotch)</text>
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<text x="966" y="486" font-size="13" fill="#7a5a1e" text-anchor="start" font-weight="bold">330 Ω</text>
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<text x="966" y="503" font-size="12" fill="#7a5a1e" text-anchor="start">(300 à 500 Ω)</text>
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<rect x="1023" y="679" width="10" height="10" rx="1" fill="#d4af37"/>
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<rect x="1051" y="679" width="10" height="10" rx="1" fill="#d4af37"/>
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<rect x="1065" y="679" width="10" height="10" rx="1" fill="#d4af37"/>
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<rect x="1079" y="679" width="10" height="10" rx="1" fill="#d4af37"/>
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<rect x="1093" y="661" width="10" height="10" rx="1" fill="#d4af37"/>
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<rect x="1093" y="679" width="10" height="10" rx="1" fill="#d4af37"/>
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<text x="823" y="670" font-size="9" fill="#cde" text-anchor="end">2</text>
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<text x="823" y="688" font-size="9" fill="#cde" text-anchor="end">1</text>
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<text x="1107" y="670" font-size="9" fill="#cde" text-anchor="start">40</text>
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<text x="1107" y="688" font-size="9" fill="#cde" text-anchor="start">39</text>
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<text x="965.0" y="770" font-size="24" fill="#fff" text-anchor="middle" font-weight="bold">Raspberry Pi</text>
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<text x="965.0" y="794" font-size="14" fill="#d8f0dd" text-anchor="middle">3B+, 4 ou Zero 2 W (pas le Pi 5)</text>
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<text x="905" y="712" font-size="12" fill="#ffe08a" text-anchor="start" font-weight="bold">patte 12 = GPIO 18</text>
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<text x="858" y="712" font-size="12" fill="#fff" text-anchor="end" font-weight="bold">patte 6 = GND</text>
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<text x="836" y="846" font-size="12" fill="#ffd6d6" text-anchor="start">pattes 2 et 4 (5 V) : NE PAS relier à la matrice</text>
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<text x="1175" y="918" font-size="13" fill="#333" text-anchor="end">bloc secteur USB du Pi</text>
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<text x="1175" y="935" font-size="12" fill="#777" text-anchor="end">(5 V, 2,5 A ou plus)</text>
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<text x="675" y="480" font-size="13" fill="#7a5a00" text-anchor="start" font-weight="bold">Pourquoi 4,4 V ?</text>
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<text x="675" y="500" font-size="13" fill="#7a5a00" text-anchor="start">Le « 1 » doit dépasser 70 %</text>
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<text x="675" y="520" font-size="13" fill="#7a5a00" text-anchor="start">de la tension des LED :</text>
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<text x="675" y="540" font-size="13" fill="#7a5a00" text-anchor="start" font-weight="bold">0,7 × 4,4 V ≈ 3,1 V</text>
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<text x="675" y="560" font-size="13" fill="#7a5a00" text-anchor="start">→ les 3,3 V du Pi suffisent.</text>
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<text x="56" y="496" font-size="15" fill="#222" text-anchor="start" font-weight="bold">Code couleur des fils</text>
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<text x="100" y="525" font-size="14" fill="#333" text-anchor="start">rouge = + 4,4 V</text>
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<text x="100" y="553" font-size="14" fill="#333" text-anchor="start">noir = GND (masse)</text>
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<text x="100" y="581" font-size="14" fill="#333" text-anchor="start">blanc = GND (masse)</text>
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<text x="100" y="609" font-size="14" fill="#333" text-anchor="start">vert = données</text>
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<text x="100" y="637" font-size="14" fill="#333" text-anchor="start">jaune = données 3,3 V</text>
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<text x="56" y="670" font-size="13" fill="#555" text-anchor="start">Tous les GND sont reliés :</text>
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<text x="56" y="688" font-size="13" fill="#555" text-anchor="start">Pi ↔ fil blanc ↔ matrice</text>
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<text x="56" y="706" font-size="13" fill="#555" text-anchor="start">↔ fil noir ↔ borne − de l'alim.</text>
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<text x="56" y="730" font-size="13" fill="#b00020" text-anchor="start" font-weight="bold">Alim. réglée sur 4,4 V !</text>
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<text x="56" y="752" font-size="12" fill="#777" text-anchor="start">Entre 4,2 et 4,5 V.</text>
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<text x="56" y="766" font-size="12" fill="#777" text-anchor="start">Fil de données : moins de 30 cm.</text>
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</svg>
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