Bug in USB Cutout position

[Aapjes94]

Hi,

Thanks for the in-depth guide. I'm preparing for a build with an extra row, as I really need a number row. While adding the finger positions and moving the cut-outs for the cables I think I found a bug.

The right case half didn't match the left one and in modules/rightCase.scad on line 38 I found
PCB_UNDERSIDE_CLEARANCE - MCU_PCB_OFFSET - MCU_PCB_THICKNESS - USB_C_SIZE.z / 2 + 5],

The corresponding line for the left case seems to be the correct one.
PCB_UNDERSIDE_CLEARANCE - max(MCU_PCB_OFFSET, USB_C_SIZE.z) + USB_C_SIZE.z / 2]

[atulloh]

Thanks @Aapjes94 ; I'll have a look. That +5 looks a bit weird, but I was tweaking those cutouts towards the end, so I probably hacked it a little.

One thing to note is that when using a PCB and Elite-C/Pro Micro, when switching sides, the USB port flips direction. e.g.

If you are adding an extra row, are you planning to hand wire? If so, it's not as much as an issue, you can probably put the cutouts wherever you want really.

[Aapjes94]

Thanks for pointing out the USB positions, hadn't thought about that yet. I thought that the point of the Elite-C/ProMicro was that the USB port was centered on the microcontroller, but it seems to be ever so slightly (0.8 mm) offset. With a small spacer on the left side, it should be possible to get the USB at a constant distance from the PCB.

I have never designed a PCB before so would really like to go that way, however, I'll have to figure out how hard that is going to be on the way. I'll probably give it a go and if the PCB fails, I'll go with handwriting. If this all ends up working I'll share the files with you.

[atulloh]

Oh ok. Yes I used an v3.1 Elite-C, and it wasn't quite the same offsets. I'll update the case code accordingly.

[atulloh]

I've added some new code and named case files on a fix branch, here:

https://github.com/atulloh/oddball/tree/fix/10-elite-c-cutout/output/case/v2.0

I've linked these with a little explanation in the build guide's Bill of Materials under the case/MCU sections.

When I get around to ordering a v4 Elite-C, or hear back from someone that the new case files worked, I'll merge this in and close.

[atulloh]

When I get around to ordering a v4 Elite-C, or hear back from someone that the new case files worked, I'll merge this in and close.

Ordered! I should have one to test out in the next week or so.

[Aapjes94]

I hope you don't mind it's a bit off-topic, but tangentially related to an earlier comment. Would you be comfortable sharing the file you used to create the PCB files? I think I'd like to take a crack at using a PCB instead of hand wiring this thing with the extra row.

[atulloh]

I hope you don't mind it's a bit off-topic, but tangentially related to an earlier comment. Would you be comfortable sharing the file you used to create the PCB files? I think I'd like to take a crack at using a PCB instead of hand wiring this thing with the extra row.

Sure. I wasn't planning to open sourcing it; I might go down the track of trying to improve it and make some for sale. To be honest, this was my first PCB and isn't the best, and breaks some basic design principles. I can send you the project; add me on Discord (tullonator#6580) or send me at email to alexandertulloh at gmail dot com and I'll get back to you.

[pannet1]

when is this going to be available for sale