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</html><thumbnail_url>https://www.brickrknowledge.org/content/uploads/2015/04/Pic_ALL-BRICK-0013.jpg</thumbnail_url><thumbnail_width>612</thumbnail_width><thumbnail_height>600</thumbnail_height><description>Der Baustein besitzt zwei LEDs, eine rote zur Kontrolle und eine Infrarot (IR) Leuchtdiode, die man nicht direkt sehen kann, bei uns ca. 900 nm. Mit einer Kamera kann man sie meist dennoch beobachten. Beide LEDs sind durch Vorwiderst&#xE4;nde vor zu hohem Stromfluss gesichert. Sie leuchten nur wenn die Diode in Flussrichtung geschaltet ist, also [&hellip;]</description></oembed>

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