This question already has an answer here:
- mix power and data for usb HDD 2 answers
I have a raspberry pi being powered by a cellphone charger (1A)
I try to connect and HDD but the power is not enough. I don´t have a powered USB hub BUT i do have other power supplies. So I tried powering the HDD by myself.. but I cannot.
I have a Y USB cable, I shortcuted the red wire from the endpoint that goes to the power suply and the HDD. So it does NOT backpower my PI. I tried 1A and 2A in the charger here. Nothing works
I also tried using the 2A adapter to power the Pi and connect the HDD to the USB thinking that 2A should be enough for everything. But it is not
I checked the specifications of the HDD and it says 5V and 1A so .... No clue why it fails.
IF I plug the HDD to my desktop PC it has no problem working. But in the Pi it starts and stops all the time making ugly noises
Any clue ??