<div dir="ltr"><div><div>We do have numbers on the fobs, anyway. Page 22 of the cm108 datasheet, and page 29 of the cm119 sheet, both show an absolute maximum rating of 70mA. There's usually an off-chip LED on the fobs, so adding say 10-20mA for that, and then accounting for random little consumptions by other parts, planning for 100mA for each fob seems safe.<br>
<br></div><div>Unfortunately, I can't help with numbers on the URIx requirements; I hope someone else can.<br><br></div><div>Powered USB hubs vary widely, as I think we've all seen, in both per-port and total current available. And as others point out, it's often down to trial and error. If you find a great one with reliable numbers, I hope you'll report back.</div>
<div><br>Good luck!<br></div><div><br>$0.02,<br></div>Eric<br></div>K5BFC<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, Jul 6, 2014 at 7:56 PM, Jonathan Weirmeir <span dir="ltr"><<a href="mailto:jonathan.weirmeir@gmail.com" target="_blank">jonathan.weirmeir@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Anyone have numbers for this?<br>
<br>
I'm looking at buying a powered USB 2.0 hub to run two URIx and maybe<br>
up to 2 sound FOBs.<br>
<br>
Wondering how much current I should need.<br>
<br>
Thanks,<br>
<br>
Jonathan<br></blockquote></div></div></div>