Hi I'm working on powering my Sony external hard drive disk.
I want to power the drive from the sector and link it to the RPi without drawing any current from it (and also because i'm a afraid of backpowering the pi, even though I'm not sure of what it exactly is, if you guys could tell me some more about backpowering I'd appreciate)
I made a picture of what I did because English isn't my native language so I think it'll be more self explanatory :
When I tested it, the drive turns itself on but I can't get the data on the RPi (nor on my computer).
Can you tell me what do to ? How to get the data on the rpi without powering the drive from the rpi usb port ?
I looked at a Y cable I have which is doing what I want and saw it was like this :
But in this case, isn't there any risk of backpowering ? And doesn't the Y cable become useless in my case since the drive draws current from the rpi too ? Are Y cables only designed to draw power from 2 usb sources instead of one ? Correct me if I'm wrong but in this diagram, the HDD draws power from the RPi AND the sector, doesn't it ?
I thought they would be perfect for what I wanted : one usb cable for the power, one for the data
I know I could simply use a powered usb hub but I want to learn by myself how things work, thanks in advance guys for your responses