What you can't see as it is covered by a wire is both floating pads are jumpered to the ground rail in both cases, as per the schematic. I'd follow the schematic rather than the photos that can misleading. As far as I can see there is one jumper from teensy Vcc to a free strip then a jumper from ...

Here is the schematic I worked off of...



Or a pdf of the schematic is here:

http://blog.wolfman.com/files/3dvert_schem.pdf

and the associated blog article is here:

http://blog.wolfman.com/articles/2009/1 ... ick-to-usb

I used the V3 schematics, and built it from the schematic I did, so I know that works. The pins are not directly connected to the plug though they go through the resistors.

I didn't notice there was a difference other than the arrangement of the pins

@Zapp - There is nothing on the back side, all the action is on the front, including the traces, the back is just thru holes, and is where you solder the pins. See this for the traces a schmartboard uses... http://www.schmartboard.com/schmartboard_pd_201-0001-01.pdf The back side has no traces, the ...

FWIW I did a schematic and PCB using ExpressPCB, the PCB has two per board, ExpressPCB charges ~$50 for 3 boards, so you get 6 for $50. The schematic and pcb editor is free from http://www.expresspcb.com/ExpressPCBHtm/Download.htm and the two files I used are here... schematic - http://blog.wolfman ...

I used a Schmartboard... http://www.schmartboard.com/index.asp?page=products_th&id=24. although the dsub needed to be coerced into it, they do have a special board for dsubs.. http://www.schmartboard.com/index.asp?page=products_io&id=16 The board was about $5. I'm making a little acrylic case for it ...

Very nice project, I have a teensy on order, however my plan is to use this to communicate with a robot control program (a rovio) running on Linux. So it would be plugged into a linux system, and I would probably want to use a different USB protocol (probably straight serial). So is the source code ...