(2025-12-24, 04:22 AM)asyncmeow Wrote: Hello!
Working on the same batch of Tangaras as my last post where I was having issues flashing them, and I'm hitting another few issues:

1. Is it common for the FFC connectors to fail in such a way where they don't latch closed? I've had this on two out of the ten connectors out of my set of 5 Tangaras, and haven't had luck replacing them (this batch was pre-assembled by PCBWay, and my surface-mount rework skills aren't the best...)
2. On some of mine, the touch wheels are too sensitive and on others they don't work at all (or both on the same unit intermittently) - is there a way to debug this? Any tips that I should follow during assembly to make sure it works properly?

(2026-02-12, 09:39 PM)larsimore Wrote: What are the factors that influence the sensitivity/operation of the touch wheel? For me, it works out of the case and with the cover sticked on like @ailurux suggested. However, if I put the case together, it just goes haywire or stops responding altogether.

(2026-02-16, 03:07 AM)ailurux Wrote:

(2026-02-12, 09:39 PM)larsimore Wrote: What are the factors that influence the sensitivity/operation of the touch wheel? For me, it works out of the case and with the cover sticked on like @ailurux suggested. However, if I put the case together, it just goes haywire or stops responding altogether.

Is anything contacting the area underneath the touch wheel when the case is put together? If you've got the haptic motor on the faceplate it should be stuck down away from the touch wheel, and make sure its able to fit together with the mainboard and not getting in the way of anything. Does it work in the case if you don't tighten the screws?

(2026-02-16, 07:41 PM)larsimore Wrote:

(2026-02-16, 03:07 AM)ailurux Wrote:

(2026-02-12, 09:39 PM)larsimore Wrote: What are the factors that influence the sensitivity/operation of the touch wheel? For me, it works out of the case and with the cover sticked on like @ailurux suggested. However, if I put the case together, it just goes haywire or stops responding altogether.

Is anything contacting the area underneath the touch wheel when the case is put together? If you've got the haptic motor on the faceplate it should be stuck down away from the touch wheel, and make sure its able to fit together with the mainboard and not getting in the way of anything. Does it work in the case if you don't tighten the screws?

I think the battery wire may be slightly touching the back of the faceplate – is that enough for interference?

(2026-05-04, 03:16 AM)jacqueline Wrote: Hi! All the hardware sources are here: https://codeberg.org/cool-tech-zone/tangara-hw

In terms of production files, I uploaded our last batch's production gerbers etc here: https://forum.cooltech.zone/attachment.php?aid=100. I believe one or two small parts may have gone out of production since our last batch, but hopefully nothing too major. (I generated them using PCBWay's KiCad plugin (hw files are  and then manually tweaked some parts of the BOM iirc)

Otherwise, all the board specs are pretty normal. The faceplate and mainboard are 1.6mm thick, and you want ENIG pads. If you have specific questions I'm happy to help.

(2026-07-28, 04:15 PM)Hwenray Wrote: Hi
Finally, my tangara works!!!
After fixing the extra pixels issue, I noticed another screen problem which makes the blacks seems strange.
There are some starange color banding on it.
Is there any way to fix this?

(2026-07-29, 05:51 AM)ailurux Wrote: Hmm, it's a bit hard to tell from the photo (not your fault, taking a photo of the screen never looks like it does irl in my experience), but there is a subtle gradient background on the inbuilt dark theme that may be causing or making the banding more apparent. You could try a theme with a flat background (such as Ayumi's theme from https://codeberg.org/cool-tech-zone/tangara-themes), and see if that helps, or if it at least makes it easier to tell whether it's an issue with the display itself or with the gradient rendering.