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  • How do you deal with thermal issues?

    Like the title states, I'm curious how you people in warmer climates are dealing with the fact that the computer in your car has to start during the middle of the day when temps inside your car are > 100*F. Cooling once the PC and car are running is not a problem, but sometimes a computer won't even boot if it's too hot. What are you doing to cool your PCs down before you take off when your car has been sitting in the sun for 6-8 hours and is 120 degrees inside?

  • #2
    where was another post w/ same question... the answer was put your comp in the trunk, it is cooler there + you can add extra "case" fan
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    • #3
      what about a solar panel fan?

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      • #4
        One trick I've learned is to build a 555 delay circuit so that you provide power to your case fans for a few seconds before you power up the PC.

        (for reference you're providing two sources of power, one directly to the fans, and one on the delay circuit that attaches to the power supply)

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        • #5
          I put my unit in the trunk and added 3 case fans. you should also get mobile processors cause i think they have a higher thermal junction temp
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          • #6
            Solar fan....now that's a cool idea. Might have to look into that one. BTW I already have the car PC built and have no problems with it, I was really just curious

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            • #7
              i thought we agreed that soplar fan is not working =)
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              • #8
                An average computer fan requires 200 milliamps which is pretty much what the car requires when it's off. So you could even constantly run the fan 24 hours a day and maybe be able to leave the car parked for 2 weeks instead of 4...
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                • #9
                  too risky
                  dont forget about alarm drain + any other not native electronics installed
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                  • #10
                    Originally posted by tempgp View Post
                    too risky
                    dont forget about alarm drain + any other not native electronics installed
                    Risky? Test it. If it works it works, if it doesn't, it doesn't. My 85 ah battery says that would work perfectly for over 17 days if the fan was alone. Add in the power the car needs which is another 200 milliamps so now we're down to just under 9 days. Hell, even throw in 2 other devices with that much drain and you're still at a couple of days. Granted, most batteries aren't 85 ah, but this baby only cost 140 bucks for me. Which is probably cheaper than the solar setup.
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                    • #11
                      This battery:
                      http://www.interstatebatteries.com/c...t%20%20battery

                      when fully charged will give a 200 milliamp fan roughly 60 hours to run.
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                      • #12
                        i use same vat as aux power still why u wnat put yourself at risk?
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                        • #13
                          I have not experienced any heat issues... Denver is seeing daytime temps 95F + hotter in the car.

                          It is a simple low power install with a CPU fan and a PS fan.
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                          • #14
                            i had recorded temps of 115 in my trunk...pc still functioned fine. would power and boot and instantly drop hardware temps when fan kicked on...stagnent hot air is bad news. my case had an open bottom, laptop case fan on top lowing out, and a cpu fan blowing outer air in across the heatsink with a grill leading directly to case. no ductwork inside but everything mounted to give a decent clearance and pathway. BTW the system is a minitix board with 3.5", standard alum heatsink with coolermaster fan, m2atx, and i think around 1Gb ram. all in a case that size of standard cd changer.

                            Most problems with heat and cold were encounted with the touchscreen. real hot meant no display and no touchy for a while, real cold meant weird display and no touchy. pretty sure had to do with resistive panel and thermal limits of liquid crystal

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                            • #15
                              my touch screen sits next to engine and works fine, inside temps areound 29C
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