![]() And the PDF, well it's spiffiest with java enabled, if you like to live on the wild side. Warning: I was using this exercise as an excuse to test-drive Altium2013. Let me know if posting this breaks any rules, and down it'll come. Most folks might benefit from the PDF, of which Altium does a pretty nice job. I believe that everything stayed in sync (at least the compiler says so, no net-list changes). I took the liberty to arrange the sch as I'm accustomed. Perhaps somebody else will find it useful. Calling pull-up resistors on the TWI "I2C Voltage Translators" is a bit imaginative (oooh, a pun!). Things to notice: Vin's (power header) reverse-polarity protection is limited due to L6 IC1B is not an analog comparator, but an amp with wide Vin+/- spec, configured as an open-loop comparator, driving T1 (Montgomery "Scotty" Scott would have issues with this). The effective net-list remains unchanged. : SCH: Added hyperlinks to some key parts. Added a couple of internal layers and moved a few tracks to those layers accordingly. : PCB import process squashed everything into two layers. : Added info about AVREF selection to the schematic.
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