Hacks to the RepRap Motherboard v1.1

From RepRap
Revision as of 08:13, 27 November 2011 by Glenn (talk | contribs) (catchg Category:Deprecated electronics)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

If you want to run this board off the USB cable without the big power connector do this:

Front-small.jpg

Put a link across two of the mounting holes for that connector (just to the left of A). Solder in a 3.3V regulator (78L33) and a 100uF smoothing capacitor at B. The flat on the regulator and the -ve wire on the capacitor are both towards the bottom of the picture.

Leave off the big 30 ohm resistor R17 on the right of the board.

Note - if you want access to the RS485 but don't want to use RJ45 connectors you'll find that simple 2.54mm pin headers fit neatly into the connections (see C).

Back-small.jpg

Then put a link as shown at A above between the third pin of the USB TTL input (the red wire on the USB connector) and pin 2 of the ISP connector.

Your board will now be fully powered by the USB cable.

Retrieved from "https://reprap.org/mediawiki/index.php?title=Hacks_to_the_RepRap_Motherboard_v1.1&oldid=47585"