[Hardware] Cannot power HDD

[M-Welsch]

Description

when trying to power an (older) 3,5'' HDD, the HDD couldn't spin up. It kept on powercycling. This also happened when I connected it directly to the raspberry pi 4. When connecting it to the laptop, it worked.

Possible solution is to set the 5V-Voltage to 5,1V. For that I would have to replace the LM9625 fixed regulator to a adjustable one.

What happens if we don't do it (aka Why is it important)?

We cannot put data to hard drives (or at least the hard drive I tested with)

Definition of Ready

no prequisites

Key Tasks

• [x] check if a higher 5V voltage like 5,1 solves the problem

Acceptance Criteria

• [x] The HDD in question can spin up

[M-Welsch]

supplying 5V (! not 5,1V!) externally resolved the problem. Maybe capacitance close to the hdd also heps

[M-Welsch]

after bridging the Ferrite in the 5V-line it worked fine