5.2mm height connector leaves enough space under CM3+, so I put SD card connector there and IC. But 5.2 is not your total height, because BCM metal lid pops higher. Using CM3 instead of CM3+ can save you some space.zontar wrote: ↑Sun Sep 20, 2020 9:14 amhttps://www.digikey.de/product-detail/e ... ND/1891239
that's just 5.2mm.. maybe this connectors are the one to go, provided they allow for the space of the bottom side compos of the Module
Small 3-5” screens only allow to stack battery, only from ~6” it’s possible to place battery next to CM3 in order to save 3-4mm height. Also, consider USB connectors that soldered to board cut out, but remember to have cut outs in your case, because retaining leaves pop off connector outline when inserting connector.zontar wrote: ↑Sun Sep 20, 2020 1:30 pmHello msl,
yes I see that the CM has a the BCM soc sticking a little high. To be honest i think I could work also with a CM normal but I relaly don't know.
I plan to pack in the smallest case possible
the slimmer, the better, but at the moment I am some months behind the point where I will think about the enclosure. My question was just to start prototyping the alpha release PCB, maybe setting off with the right foot.
- a custom built Carrier board
- a compute module (not lite)
- a 3K or 4K mA battery pack
- a small screen (3 or 4")
Thanks for the nice idea
Connector is TE 1473005-4. And prepare good flux and soldering iron - it’s so easy to make a solder bridges on SODIMM connectors.zontar wrote: ↑Sun Sep 20, 2020 2:35 pmHi msl!
thanks, I've read the thread you posted. Looks very nice and 14mm is not too thick for me.
Could you suggest the SODIMM 200 connector that you used?
I am still not sure about the screen size but I doubt it will be more than 5". What are you using? Is it something low power and high visibility under the sun, by any chance?
Thanks for sharing your picture!
AS per the case I plan on prototyping it with a 3D printer at first, but then I plan to find somewhere an industrial designer, design a proper case and have it printed professionally.
Is there particular company you’re going to use? Company-that-every-blogger-is-talking-about don’t solder any connectors
I was obsessed by “slimmest Pi I the world” idea a month ago and concluded that there can be two options similar to what you mentioned:Imperf3kt wrote: ↑Sun Sep 20, 2020 10:10 pmI've got an RC transmitter that has its chips embedded in the middle of the PCB, maybe you could find something similar for a sodimm socket?
No idea what term to search, unfortunately, but they really make circuit boards much thinner than they'd otherwise be.
If you're having trouble visualising that, imagine drilling a hole in the PCB, putting the microchips in said holez then soldering the wires to the sides of the hole.
Thanks for sharing your experience. Hope to try one of PCBA services soon and not to exceed 150€ customs limit...zontar wrote: ↑Tue Sep 22, 2020 1:27 pmHi,
at PCBWay they do plenty of connectors (even fine pitched like the camera socket and with fine THP pins as the miniDisplayport at bottom) and pretty small compos with very close spaced pins (see unsoldered U2 on bigger board, which I suspected had a brigde).
They can do also electrical testing.
I am not endorsing them in any way apart from the fact that I am using them with more than enough satisfaction.