Question about cooling a receiver using pc fans. - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 4 Old 08-17-2013, 10:59 PM - Thread Starter
AVS Special Member
 
Mrkazador's Avatar
 
Join Date: Jun 2005
Posts: 3,838
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 250

I looked up a few threads of people using relays, usb, and even pre made kits to cool down a receiver or entertainment center. I was looking for something different and came across thermostat discs like this one.

 

www.radioshack.com/product/index.jsp?productId=12492564

 

The positive (or negative?) side of a 12v wall wart will hook up to the thermostat and the other end will connect to a pc fan. When the receiver gets hot enough the switch will close completing the circuit which will turn the fan on. When the receiver is off and cools down the switch will open turning off the fan. Is this correct or am I totally wrong on how these things work?

Mrkazador is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 08-18-2013, 05:43 AM
Advanced Member
 
qguy's Avatar
 
Join Date: Dec 2008
Posts: 900
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 59
Lots of complete projects

http://www.google.com.ph/?gws_rd=cr#bav=on.2,or.&fp=16073f80e0f09877&q=temparature+controlled+fan
qguy is online now  
post #3 of 4 Old 08-18-2013, 04:40 PM
AVS Special Member
 
Suntan's Avatar
 
Join Date: Mar 2004
Location: Twin Cities
Posts: 7,103
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 31
I've done similar with my living room media cabinet. I used an adjustable bimetalic switch from an old window fan I had. It was wired in series with a 12v wall wart and 4 PC fans.

Only thing I would caution with that non-adjustable switch set at 100 F would be to check the hysteresis of the switch. If the temp it needs to get down to to shut back off is too low, your fans may not shut off during the warmer summer months.

-Suntan
Suntan is offline  
post #4 of 4 Old 08-18-2013, 06:54 PM
Senior Member
 
mhutchins's Avatar
 
Join Date: Aug 2006
Location: Austin, TX
Posts: 428
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked: 53
As Suntan mentions, that Radio Shack switch must cool to below 68 degrees in order to reset. That is a 36 degree difference between the open and close points. I don't know about your house, but here in Texas, that fan will never turn off until January... eek.gif I used one of these Snap Disc Controls to cool my projector in a hush box I made and it works like a charm. These controls have a much tighter operating band and you will probably have better success choosing a control with a narrower temperature differential ie. less hysteresis.

Mike
mhutchins is offline  
Reply DIY Speakers and Subs

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off