Fans and USB power - Raspberry Pi Forums

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so, had finished creating nice little file server yesterday, , noticed pi (model b) getting tad hot. used command /opt/vc/bin/vcgencmd measure_temp temperature (i wrote little script make show fahrenheit too). saw, , felt hand, getting hot. 51.4 ºc exact. wanted run pi , drives day, , room in isn't cooled. decided i'd hack little fan , stick on top. used old macbook 2007 fan, wired old usb cable, , mounted fine.

comes harder part. @ first happy have fan plugged outlet , let run. doesn't suit me anymore. i'm wondering if can make pi turn power on , off 1 of 2 usb ports. pi can turn 1 port off normally, turn on once reaches temperature. fan, being permanently plugged port, turn on once pi gets hot enough. script software part using measure_temp command, isn't big issue. need know if can turn port off.

thanks,
john

you can't turn usb port on or off.
suppose have soldering iron , access electronics store?
if so, simple solution: wire nmos gpio pin , use control power fan.
otherwise, i'm not sure can do. why not leave on 24/7?


raspberrypi



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