[sdiy] PCB heat simulations?

Mattias Rickardsson mr at analogue.org
Wed Nov 13 22:31:39 CET 2013


It's just such a pity that the air is invisible, otherwise we could
see exactly how it moved and know all this! Or hey, wait... 8-)

/mr


On 13 November 2013 22:28, ASSI <Stromeko at nexgo.de> wrote:
> On Wednesday 13 November 2013, 22:08:49, Mattias Rickardsson wrote:
>> That's one of the things I'm considering - not a chimney per se, but a
>> hole in another PCB placed above the hot component. The question is if
>> it helps much. If there is considerably more convection upwards from
>> the hot component, it will have effect to place the hole there. If the
>> heat & convection forces are spread more evenly over the PCB area, it
>> will have less effect, and other hole positions will not be better
>> either.
>
> The single most effective change in your arrangement would be to put the PCB
> stack vertical instead of horizontal.  Leaving a hole above a hot component
> is better than nothing, but certainly not as effective.  A pin-finned
> heatsink on the hot component protruding through the hole on the other hand
> would likely be a better arrangement than the same in open space (without
> the second PCB).  If you really must know, build yurself a thermal dummy and
> check the temperatures for a few variants.
>
>
> Regards,
> Achim.
> --
> +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
>
> Waldorf MIDI Implementation & additional documentation:
> http://Synth.Stromeko.net/Downloads.html#WaldorfDocs
>
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