A single board with a pic32mx170 mcu (sdip), mcp2200 usb/serial link using A4/B4 for serial io, simple power supply, B0-15 pins and A0, A1 in approximate arduino template. The prototype design (mu-2p) for the copper/solder mask worked well, this version mu-2b updates the silkscreen layers and very small copper changes (not specifically tested yet).

mu-2b Readme + component list + schematic + layout :

http://www.thebackshed.com/forum/uploads/chronic/2015-11-05_000750_mu2b.zip

Manual for a small fortran77 interpreter running on it : [ Revision 1, slight corrections, mid march ‘16 ]

http://www.thebackshed.com/forum/forum_posts.asp?TID=8409&PN=1&TPN=2

Older mu-2p schematic and layout (which have the update applied):

http://www.thebackshed.com/forum/uploads/chronic/2015-10-31_220024_schematicmu-2p.pdf and http://www.thebackshed.com/forum/uploads/chronic/2015-10-31_220102_layoutmu-2px.pdf