geekhack

geekhack Community => Keyboards => Topic started by: Zamorph on Mon, 02 May 2011, 14:26:33

Title: USB ports on keyboards
Post by: Zamorph on Mon, 02 May 2011, 14:26:33
Do the usb ports on keyboards have any problems?  Some keyboards sport usb 2.0, do they have any input lag?  Thanks :)
Title: USB ports on keyboards
Post by: Arc'xer on Mon, 02 May 2011, 14:33:26
Input lag comes from many other sources and many other components; than the ports themselves.
Title: USB ports on keyboards
Post by: Zamorph on Mon, 02 May 2011, 14:36:17
Ah gotchya, if I used double usb ports, I would probably have my Headset and either a mouse/ipod in the second one, think it could handle it?
Title: USB ports on keyboards
Post by: pitashen on Mon, 02 May 2011, 14:46:17
There won't be lag, but it would definitely affect the bandwidth. I did witness reduce in pulling rate when my mouse is plug into a hub sharing bandwidth with other device. No biggy though, for the most part.
Title: USB ports on keyboards
Post by: Zamorph on Mon, 02 May 2011, 14:46:57
Quote from: pitashen;340512
There won't be lag, but it would definitely affect the bandwidth. I did witness reduce in pulling rate when my mouse is plug into a hub sharing bandwidth with other device. No biggy though, for the most part.

Ahhh I thought that would happen.
Title: USB ports on keyboards
Post by: The Solutor on Mon, 02 May 2011, 14:49:31
Quote from: Zamorph;340505
think it could handle it?

 
I actually have a mouse receiver and a Droid Z (tmobile G2 in the US) connected to my backlit keyboard, w/o any problem.

That said it depends on the mainboard and its age.
Title: USB ports on keyboards
Post by: Zamorph on Mon, 02 May 2011, 15:10:41
Quote from: ripster;340531
Lulz.  Wrong again.  Especially unforgivable after trolling the "My IBM doesn't work on PS/2" thread.

USB is a regulated 5.0V and amperage.  Only real exception is laptops.  They suck at following specifications.
Is it 5 per USB? I just looked up my head set and it needs 3.0 V, 2.2 K ohm
Title: USB ports on keyboards
Post by: The Solutor on Mon, 02 May 2011, 15:11:31
Quote from: ripster;340531
Lulz.  Wrong again.  

 

You should read "The Fox and the Grapes" you can learn a lot about yourself.

You should also try to speak about something you tried.


Unlike you, most of the modern motherboards are vastly tolerant about the current they provide trough USB, sometimes you can drain even 2 A (which is 4x what the specs recommends).