Source is available in GitHub:

https://github.com/ltomov/4-port-usb-hub

Schematic is based on Olimex's Olinuxino:

https://github.com/OLIMEX/OLINUXINO/tree/master/HARDWARE/A13-OLinuXino


Works both in self-powered and bus-powered modes.

PCB is tested and working, however it's quite possible that there's a lot of room for improvements. Suggestions are welcome!


Enjoy!