On Thu, Mar 30, 2017 at 1:41 PM, Normand Chamberland <[email protected]> wrote:
> 2017-03-30 6:21 GMT-04:00 Luke Kenneth Casson Leighton <[email protected]>: >> >> * 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 > > > _______________________________________________ > arm-netbook mailing list [email protected] > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to [email protected] _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
