How do upgrade your extruder firmware

Just as an FYI for anyone who’s having trouble upgrading your MakerBot Cupcake CNC plastruder firmware, the instructions built into ReplicatorG don’t tell you to unplug the TTL cable from the motherboard and plug it into the extruder board.

So, save yourself 5 minutes of frustration and googling for the answer…  and just plug the TTL cable into the extruder board.  :)

Electronics blog

While googling around looking for an answer to which opto-endstop cables go to which endstops and which max/min, I found Kieth’s Electronics Blog.  That stuff is mostly way over my head, but his blog is extremely detailed and informative.