120mm fan powered by USB from TV?

chid76

chid76

chid76

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I have just set up a Denon AVR X2200W amp and the centre section of my TV bench is getting a bit toasty.

I have the amp at the bottom, then a glass shelf with my PS4 and media streamer above. The PS4 is getting too hot when gaming with the amp on, which is leading the fan in the PS4 to run at 100%.

My TV (LG 42LB650V) has got a couple of spare USB ports on the back and I was thinking of wiring up a quiet 120mm fan so that it would turn on with the TV, enabling me to fit it to the back of the TV bench to draw out some of the hot air.

Have any of you done this before? If so, can you point me in the right direction of a suitable fan and adapter? or is there another solution that would be better?

Thanks :)
 
I had a similar idea to yours as my newly acquired Denon AVRX4000 is on the toasty side too.

My HTPC is on the same time as said receiver, I plan on running a PSU molex or sata power lead out of the back of it to run a couple of slow spinning 140mm case fans on top of the receiver case to draw the warm air out.

A quick google says it can be done (DIY) but USB is 5V & case fans are 12v so you would need to find out if any of them will spin up with that kind of voltage.

Best to ask Tealc, he's the fan modding expert on here.
 
The problem is the PS4, which has insufficient cooling when enclosed in a restricted space.

Your amp is hardly raising the ambient temperature by a large margin!
 
pioneer2000 said:
The problem is the PS4, which has insufficient cooling when enclosed in a restricted space.

Your amp is hardly raising the ambient temperature by a large margin!
Click to expand...

The amp is definitely raising the temperature by a chunk as the PS4 is fine on it's own. I would rather not have a quiet desk fan flowing cool air onto it to keep it all cool. I think with a little expelling of the hot air, things would run a lot cooler.
 
heat rises.

i would place the ps4 at the bottom as it's cooler and the amp above.

that way the ps4 shouldn't ramp up as much.

does the unit have vents at the back?

i also believe AVR's are supposed to be in a well ventilated area rather than in a cramped location with no airflow.
 
pioneer2000 said:
The problem is the PS4, which has insufficient cooling when enclosed in a restricted space.

Your amp is hardly raising the ambient temperature by a large margin!
Click to expand...

Don't insult his intelligence; anyone can put their hand on something and work out whether it's a heat source or not.
 
Psycho Sonny said:
heat rises.

i would place the ps4 at the bottom as it's cooler and the amp above.

that way the ps4 shouldn't ramp up as much.

does the unit have vents at the back?

i also believe AVR's are supposed to be in a well ventilated area rather than in a cramped location with no airflow.
Click to expand...

My amp gets MUCH hotter than my PS4....



But yea just sounds like to much hot stuff in to small a place with not enough ventilation. Rather than mess around with fans I'd just move the PS4 out of there.
 
TheVoice said:
Don't insult his intelligence; anyone can put their hand on something and work out whether it's a heat source or not.
Click to expand...

Guarantee that even if he removes the amp, the PS4 will still ramp up like a Hoover if it's on an enclosed shelf.

I'm talking from experience as I have a PS4 in a besta unit that struggles due to the lack of space either side of it when in the unit.
 
i also have a ps4 and i believe it's also a besta unit.

guess what it doesn't ramp up at all.

ps4's run far cooler than any avr. the fact that an avr has to deal with powering multiple speakers, process a picture, crossover points, bi amping, etc. you would have to be retarded to think a ps4 runs hotter than an avr, therefore the guys clearly a troll.
 
This will definitely work the only challenges are whether a 12v fan will spin up at 5v and whether you get one with the right header (USB) or not.

If you're going for a regular PC fan and swapping the converter out (easy if you can solder) then look for one that comes with a 5v in line resistor like the Noctua ones. If they come with a resistor to drag a 12v motherboard header down to 5v it's a safe bet they will spin up at 5v via USB.

Google 120mm 5v usb fan and the answer shall be yours...
 
Ste said:
This will definitely work the only challenges are whether a 12v fan will spin up at 5v and whether you get one with the right header (USB) or not.

If you're going for a regular PC fan and swapping the converter out (easy if you can solder) then look for one that comes with a 5v in line resistor like the Noctua ones. If they come with a resistor to drag a 12v motherboard header down to 5v it's a safe bet they will spin up at 5v via USB.

Google 120mm 5v usb fan and the answer shall be yours...
Click to expand...

Cheers, I have managed to source one on Amazon for £13 that has the USB connector and a low voltage fan that has a 3.5v start-up.
 
I had a similar problem. I took the back off my AV cabinet, put a large blob of bluetak to create a small air gap on the front doors, then bought an Arctic Breeze USB fan. I have it blowing along the top of the PS4, with all the air directed out the back of the cabinet. Made quite a surprising difference.
 
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