Post
Topic
Board Hardware
Re: Which USB hub to use with Block Erupters or K1? A List.
by
A_Member
on 02/08/2013, 20:11:27 UTC

I noticed that one too.. got a mix of USB 2.0 and 3.0... wouldn't work with the Pi right?

according to the specs on their site:

\\
4 Upstream and down stream USB 3.0 ports. 9 Upstream and down stream USB 3.0 ports. 480mpbs and 5gbps transfer rates with on/off LED indicator with power switch for each port. Supports hot swap plug and play  devices.

**Does not need power supply to operate but recommended for high power consumption devices**

Hub weight: 140g
Cable Length 100cm
Power Supply 3.5mm DC 5v jack.

//

Can't find the Amps..

yea i couldnt either

Speedy response back from the company contact on their website... states the following:

"I believe, the units are as follows : 5 Volts , 45 Watts 9 Amps - 900mA each USB port."



I emailed them and got the same response.  But is it just me or does the math not work out? 

This is my assumption util I hear back further from them.  There are 13 ports.  USB 3.0 has 3 power configurations, low power, high power, and charging only.  Assuming the 4 USB 3.0 ones are high power, that/s 900 mA each or 18 Watts.  That leaves 27 Watts of power remaining split among the 9 remaining USB 2.0 ports.  At 5 volts a piece, that's 600 mA per port (which is a bit higher than the standard of 500mA so I don't know why they would do that).

Have you heard anything back from Juiced Systems yet?

Would posting this be considered double-posting?  Should I have instead edited my previous post to add this question?