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geekhack Community => Keyboards => Topic started by: trax on Wed, 04 April 2012, 15:21:05

Title: HHKB 2 Hub not enough power?
Post by: trax on Wed, 04 April 2012, 15:21:05

I got a mini USB stick for my HHKB PRO 2 but due to some weird reason it says that theres not enough power for the connected device?

Hows this possible? Its only an usb stick.
Also got a bigger/older USB stick that does work :(

Title: HHKB 2 Hub not enough power?
Post by: captain on Wed, 04 April 2012, 15:23:49

What is the HHKB plugged into?  If its an iPad there isn't even enough power for the keyboard!  ;-P

Also, note that HHKB Integrated USB 2.0/1.1 Hub (Current supply limited to 100mA). Your thumb drive probably draws more than 100mA.

Title: HHKB 2 Hub not enough power?
Post by: megnin on Wed, 04 April 2012, 15:24:33

I had the same experience when I plugged a USB stick into mine.  :-(

Title: HHKB 2 Hub not enough power?
Post by: captain on Wed, 04 April 2012, 15:28:36

Integrated USB 2.0/1.1 Hub (Current supply limited to 100mA)



How much current do the Happy Hacking Keyboards draw?

Maximum: 100mA Actual: 30mA

How much current do the Happy Hacking Keyboards Lite2 support on the USB downstream port?

[Downstream of HHKB Lite2(USB)]supports 100mA.

Title: HHKB 2 Hub not enough power?
Post by: trax on Wed, 04 April 2012, 15:40:34

The stick states to be compatible with USB 1.1
Meh, just sending it back.

Title: HHKB 2 Hub not enough power?
Post by: hcry4 on Wed, 04 April 2012, 16:08:27

Yea. It's just how it is. Most usb sticks probably won't work. Some mice don't work either because there isn't enough power. For example, deathadder is okay, but xai and sensei don't work.

Title: HHKB 2 Hub not enough power?
Post by: o2dazone on Wed, 04 April 2012, 18:54:09

yeah, it's the amount of power the HHKB sends to those ports. It's enough to power my trackball, but devices that draw more power, or require "charging", the HHKB doesn't give it enough juice. Definitely lame.

Title: HHKB 2 Hub not enough power?
Post by: ironman31 on Wed, 04 April 2012, 20:10:17

Is there any way to mod this?

Title: HHKB 2 Hub not enough power?
Post by: trax on Thu, 05 April 2012, 12:32:35

Quote from: ironman31;567132

Is there any way to mod this?

I've overclocked USB ports, but only the frequency.
I'm not sure if its even possible, according to captain the hub only provides 100mA.

Honestly its not HHKB to blame, wikipedia states "A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0"