Found open project - A5V11 power / USB / RS232 shield board: https://github.com/rororor/a5v11-mod-01
Contains KiCAD sources and Gerber files.

Uses Fe1.1s USB hub chip, 3 ports are free, 1 port used for USB-RS232 (CH340G).
5V generated by cheap MP1584/MP2307 DC-DC module.

https://camo.githubusercontent.com/f26c2228a5b36d018cb134d5686d3566be74c574/68747470733a2f2f7261772e6769746875622e636f6d2f726f726f726f722f61357631312d6d6f642d30312f6d61737465722f7363682f6f75742f7363682e706e67

https://camo.githubusercontent.com/48c6c8cf82f89288ab3aa64c52dbe2ba8b1a7f55/68747470733a2f2f7261772e6769746875622e636f6d2f726f726f726f722f61357631312d6d6f642d30312f6d61737465722f646f632f706963732f66726f6e7430312e6a7067

https://camo.githubusercontent.com/827faf3f88194ee3a62954019e07429624fef448/68747470733a2f2f7261772e6769746875622e636f6d2f726f726f726f722f61357631312d6d6f642d30312f6d61737465722f646f632f706963732f6261636b30312e6a7067

https://camo.githubusercontent.com/f44290baaebb2b40aefa820f577a8101e5d5f7ec/68747470733a2f2f7261772e6769746875622e636f6d2f726f726f726f722f61357631312d6d6f642d30312f6d61737465722f646f632f706963732f6d6f756e7430312e6a7067

(Last edited by q452378 on 16 Jul 2016, 08:18)