02/26/2016 at 01:06 •
Revision 2 of the Pi Zero USB hub is alive! Today I completed the initial bench test of the hub and all features worked as I expected. There were a couple minor issues discovered by users in the comments which are not implemented on V2.0 but are implemented in the posted gerbers.
As mentioned in the last project log, this revision sacrifices a USB port for a SMD WiFi module which gives the Pi the same networking capability as an external USB WiFi adapter and uses the same chip set as such adapters. If you'd like to order the hub, I've posted zipped gerbers in the file storage below and have updated the BOM.
The next step is to finish testing the design as well as work on the next revision. I'm aware some people would prefer four ports over the WiFi module so I plan to do some space management and have the option for either a port or WiFi module. External power input is also being considered. Please let me know if you'd like to see any other features. Feedback is always appreciated and thanks again for following this project!
01/23/2016 at 04:30 •
The PCBs have arrived as have the parts from Digikey! Unfortunately, revision one has some major issues. Due to my negligence, the ground plane was not on the PCB I ordered from OSH Park :( This is a frustrating setback but will certainly be fixed shortly. In addition to sending the entire design this time, the new board will have several new features noted in the proposed changelog below.
-0603 footprint adjusted
-Micro-USB changed to part easier to hand solder
-One downstream port removed and replaced with Wifi module
-Ceramic antenna for Wifi added
-Oscillator footprint updated
-Global power LED added
Suggestions are certainly welcome!
Thanks to everyone for their advice and support. Revision two should be quite exciting.... Be sure to check back regularly!