On Thu, Mar 30, 2017 at 1:41 PM, Normand Chamberland gemnoc@gmail.com wrote:
2017-03-30 6:21 GMT-04:00 Luke Kenneth Casson Leighton lkcl@lkcl.net:
- the PCB will fall out of the casework (both ways, forwards and
backwards).
Actually it won't. :-) It cannot slide frontward due to upper layers stopping the DC/VGA ports.
i noticed that just now on rechecking.
As for backwards it's more of an issue, only the right back corner of the EOMA card receptacle (have no idea how it's called) will be stopped by a width of 3mm.
pcb needs to be completely hidden.
- it will also lift upwards by about... 1mm, rattling around.
Yes that bugs me too.
- the middle layers also need to be split into separate halves.
Yes, that's what I did... Not happy with it either as it increases the number of parts.
less material. less weght and less wastage.
shift height line up with base and there's automatically one less entire layer.
if i found a smaller DC jack (not going to do that now) @ 9mm high it would be one more less layers.
I went with a case depth approx. equal to the PCB because the Crowd Supply page mentions the microdesktop casing to be 4.5 x 4.5 inches (114mm). But if we can make it deeper and have the separate halves connect, it would be much better.
see what happens
right now, the components are in the way.
- the layer below the PCB (with a cutout for the micro-sd card) will
be in direct contact with the PCB, preventing heat dissipation
I naively thought that being a low powered CPU, it would not be needed. I did mention I know nothing about electronics. :-P
it's not the card t's the PMIC. total is 20 watts. USB is powered from here as well and the 20 pin header can take up to 7 watts.
- also you notice the cut-away in the corner of the PCB underneath
the eject button for the PCMCIA holder? the idea there is to put a small recess (which we have to think how not to interfere with the aesthetics) that will make it easier to eject.
Was wondering about that cut-away. The eject button isn't modelled in the microdesktop_model2.stl file.
i know it's the wide bit on the right.
I need to go, I have an idea about holding the PCB but I need to think more about it...
ok. btw the pcb needs to be hidden from view as well.
Cheers
Normand
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