After some poking around in the USB standard, he found that most support per-port power switching (PPPS), and set about to hack a USB hub to enable software-controlled per-port switching.
You need a 3.3V -> 5v logic doodad or make some transistors to drive the mosfet gates. See here. Sabrent 4 port (HB-UM43): GL3510 hub doesn't have per port port control pins switches directly connect ...