[Pál Bakula]

Could somebody who owns a working hub measure the resistor between pin4 (sense) and pin5(GND) and between pin4 and pin1(VCC) of the USB connector. (The second measurement is expected to be infinite ohms.) I’d like to try to make my own Y-cable. Thanks!

[Pál Bakula]

In the USB hubs there’s usually a diode to prevent the power current flow from devices to host.

I own an USB 2.0 hub with external power. I disassembled the hub an soldered a jumper over the diode.

I attached the hub to a USB-C – USB-A female cable and the charger to the external power input of the hub and it works.

It also works if tha charger is connected to a device port with a USB-A male – USB-A male cable (USB extension cable  + USB-A male-male gender changer).

[Pál Bakula]

Mine is not stable despite it’s 1538.

By the way the ‘mystical’ number is the manufacturing date code of the IC.

Mine was manufactured on the 38th week of 2015.

I personally don’t think that there would be a connection between the ‘stability’ – or call it whatever – and the date code of the SPI flash IC (BIOS).

 

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