Date: Tue, 3 Apr 2012 15:45:39 -0700 From: Devin Teske <devin.teske@fisglobal.com> To: "'Ron McDowell'" <rcm@fuzzwad.org>, "'freebsd-current'" <freebsd-current@freebsd.org> Subject: RE: Switching on/off 5V power to a USB port Message-ID: <05b201cd11eb$7ef032b0$7cd09810$@fisglobal.com> In-Reply-To: <4F7B761B.4030104@fuzzwad.org> References: <4F7B761B.4030104@fuzzwad.org>
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> -----Original Message----- > From: owner-freebsd-current@freebsd.org [mailto:owner-freebsd- > current@freebsd.org] On Behalf Of Ron McDowell > Sent: Tuesday, April 03, 2012 3:14 PM > To: freebsd-current > Subject: Switching on/off 5V power to a USB port > > I just got a little USB powered fan and it sure would be nice if I could > have cron on my FreeBSD box turn it on or off at certain times by > switching off the 5V line on a USB port. Anyone know how I can do > that? Thanks. Alternatively, you could just plug your USB fan into your monitor. A fellow engineer and I discovered that most monitors power-down the USB ports when entering power-save mode (with Dell, HP, and Viewsonic, this is whenever the screen blanks due to inactivity; are you using DPMS and/or greensaver?). Walking away from the PC will cause the fan to [eventually] turn off, while waggling the mouse brings it back to life. > BTW this is a pretty decent fan for the money. :) > http://www.amazon.com/gp/product/B0033WSDOM/ We didn't have a USB powered fan, so we actually wired an internal case-fan to the 5V lead and went that route. Nice fan though. -- Devin _____________ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you.
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