[time-nuts] Thunderbolt mounting

[gary]

Just thinking outside of the Styrofoam box, wouldn't an analog 
controller on the fan be better? That is use a DC fan and adjust the 
current to change the speed.


On 7/11/2012 8:54 PM, Chris Albertson wrote:
> On Wed, Jul 11, 2012 at 6:55 PM, Mark Spencer <mspencer12345 at yahoo.ca>wrote:
>
>> I tried putting my thunderbolt in a styrofoam box.   It got hotter than I
>> liked and didn't seem to perform any better than when I left it in a
>> cardboard box.
>>
>> I worry about the long term implications for component life as the
>> temperature goes up.
>>
>>
> The advantage of the insulation comes in when you build the fan controller.
>    Mine uses a temperature sensor and an IC comparator that drives a
> transistor that drives a 12V fan.  The fan does on when the set point is
> reached then goes off.  If you set the operating point a little higher then
> the inside of yur house then the fan cycles and keeps the inside of the box
> and roughly, more or less constant.   The parts to build a fan controller
> are about $5
>
> If you don't have a temperature controlled fan then the next best thing is
> a well vented cardboard box whose only purpose is to keep air currents off
> the unit. Insulation without an active temperature controller is only going
> to make it hotter, not more stable
>
> Chris Albertson
> Redondo Beach, California
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