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Ramps 1.4 diodes:
D1: Install this *ONLY* when using a 12V supply. This makes it possible to print without having the USB cable plugged in (Some additional hardware is required to run as a "stand alone" printer - such as SD ramps or an LCD controler)
D2: Appears to be part of a circuit to protect against reversed polarity. Even so, make a habit of checking the polarity. It is just smarter to not take chances.

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current23:21, 15 November 2012Thumbnail for version as of 23:21, 15 November 2012867 × 663 (98 KB)Dazed.dnc (talk | contribs)
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