Introduction: USB Powered Hub Hack for Raspberry Pi External Harddrive
Step 1: Intro
I recently got a Raspberry Pi to use as a HTPC running Raspmc.
But came into problems where the Rpi does not provide enough bus power on its USB ports to power a 2.5" external harddrive.
So I decided to add a external 5v power supply to provide power to a hub with its own switch.
I am using the USB port on the TV to power the Rpi and a 5v 1000mA to supply the hub with the harddrive attached..
This is what i did..
Step 2: Requirements
For this Instructable I have use bits and pieces that I had floating around the house..
All that is needed is a:
Some heat shrink tube
A few pieces of wire
Some DC male/female connectors
And a 5v power supply (1000mA is enough)
Step 3: Take Apart
I removed the cover for the hub and removed the DC jack connected to the circuit board.
Just to be safe check the polarity with a multimeter by taking a Male DC jack and testing for continuity on the +5v line and negative rails on the board its self.
With the hub I am using there are 2 Negative (Far left and far right pins) and the center pin is +5v.
Step 4: Add the Switch
Then solder the toggle switch in between the +5v line and the board.
Connect the negative straight to the board. ( The board had 2 negative pins so I made a small Y-split)
I have used a male usb cable to power hub so it can still be used on a computer. (I cut the green and white data lines off so it's just the 5v+ and negative )
Step 5: Test
After I tested to make sure nothing was shorting and the switch works I put it all back together..
(There are now 2 switches on the hub. The original is to turn the actual ports off and the added toggle switch turns on the main power)
Participated in the
Raspberry Pi Contest
2 years ago on Step 2
What was the point of this again? To add power to the hub?
Reply 1 year ago
To help power any hard drives on the pi. I found when adding 2x 2,5" drives, The Pi does not supply enough power.
9 years ago on Introduction
i'm also soldering topless all the time!! ;)
Reply 6 years ago
me too MD
6 years ago
9 years ago
I never had problems with using a USB hub to power my raspberry pi and it's running for almost a year now. Nice tut btw.