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/web/kaklik's_web/projects/mikrovlnka/mikrovlnka.cs.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
 
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="description" content="description"/>
<meta name="keywords" content="keywords"/>
<meta name="author" content="author"/>
<link rel="stylesheet" type="text/css" href="../../default.css" media="screen"/>
<title>Light</title>
</head>
 
<body>
 
<div class="container">
 
<div class="navigation">
 
<div class="title">
<h1>Light</h1>
<h2>- bright and smooth -</h2>
</div>
 
<a href="../../index.cs.html">Domů</a>
<a href="../../projects.cs.html">Projekty</a>
<a href="../../index.html">Dokumenty</a>
<!-- <a href="index.html">Maecenas</a> -->
<div class="clearer"><span></span></div>
 
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<div class="holder">
<h2>UV Osvitka plošných spojů z mikrovlné trouby</h2>
<p>&nbsp;</p>
<p>Toto zařízení vzniklo docela náhodou, když jsem od jednoho známého dostal
nefunkčí mikrovlnku, prý jestli jí třeba nedokážu k něčemu použít. Nejdřív
jsem myslel, že takový krám je úplně kničemu, protože uvnitř nic pro
robotiku evidentně užitečného nebylo.</p>
<p>Ale po nějaké době, jsem vyráběl nějaký plošný spoj fotocestou a mikrovlnku jsem používal,
jako podstavec pod UV lampu. Nebyla to moc stabilní konstrukce a proto, se
lampa pořád sesouvala a padala, až přišel otec s otázkou. Proč to neudělám nějak
pořádně, když mám vlastně hned vedle lepší mechanickou konstrukci i s časovačem?</p>
<p>A tak vynikl nápad UV lampu umístit do mikrovlnky. Pokusím se zde popsat postup
jak se to ve skutečnosti realizuje. Nebudu, se ale snažit napsat přesný návod,
protože při výrobě každého kusu (v tomto případě asi 3.) vznikly vždy nějaké
nepředpokládatelné potíže. Takže tady budou pouze osvědčené postupy.</p>
<ul>
<li>Mikrovlnka - úplně jakákoli, ale s funkčním časovačem, lze použít
digitální i mechanický časovač. Dokonce verze 2 byla postavená i z mikrovlné
trouby, která měla integrovaný gril, to bylo moc užitečné, protože fotoemulze se
pak dala i rychleji sušit.</li>
<li>UV Výbojka - používám boďto z horského slunce (koupená v elektru asi za 150Kč),
nebo vnitřní trubici z rtuťové výbojky. Vnitřní trubice se získá tak že se
celá výbojka zabalí do hardru a kladivem se opatrně rozbije vnější baňka s
luminoforem, trubice se odstřihne od patice, dřív než se sama adlomí, aby
nedošlo k poškození. (Luminofor je třeba nechat odborně zlikvidovat,
protože obsahuje velké množství těžkých kovů.) </li>
<li>Tlumivka - tlumivka je nutná pro fukci předřadníku, aby nedošlo ke zničení
výbojky vysokým proudem. Dá se většinou sehnat například z vyřazené pouliční lampy.
Tlumivky pro světelné zdroje jsou vždy navrženy pro nějaký konkrétní výkon,
který je vždy vyznačen na tlumivce. Tento výkon musí sedět s udaným parametrem
výkonu na výbojce.</li>
</ul>
<h3>Konstrukce</h3>
<p>Nejdříve je třeba mikrovlnku téměř úplně rozebrat a vyndat všechny nepotřebné
díly. Může zůstat pouze odrušovací filtr, ventilátor, časovač a případně
osvětlovací žárovka (žárovka se hodí na osvětlení při vkládání plošného spoje
s předlohou, a během expozice může klidně zůstat rozsvícená, protože
fotoemulze na ní je prakticky necitlivá.) VN trafo, magnetron a motor na
otáčení talíře musí pryč.</p>
<p>Když sou venku všechny nepotřebné díly, tak máme místo, abychom navrhli umístění UV výbojky. </p>
</div>
 
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