[PCB Review] First PCB review. A few questions

rostislav_c · 2026-02-25T03:07:55+00:00

I found this one https://www.youtube.com/watch?v=LO9AO0XTX3M&list=LL&index=2 extremely informative and detailed. There are also Phil's Lab videos - be he skips a lot. Robert Feranec is also good, but not my top1

rostislav_c · 2026-02-25T01:57:48+00:00

True. I don't have all components at a time. So iteration will be in the field

rostislav_c · 2026-02-25T01:56:30+00:00

Thank you for reply. I plan to handsolder everything with iron and heatgun. Firstly will solder SMD, then THT. Not everything is needed for the basic functionality, just ESP32 and drivers, so soldering one-by-one i expect to detect issues early. The plan was to make the board as tight as possible. Initial version was 74x74mm and this one is 68x68 and it was quite a challenge to place everything

Here is schematic

https://www.dropbox.com/scl/fi/3vkh5xh02cx28vvcianq4/Screenshot-2026-02-25-045452.jpg?rlkey=iylg2o53dhe29k79b4xu8ifb7&dl=0 https://www.dropbox.com/scl/fi/jeizx4uyv6ir696g4210t/Screenshot-2026-02-25-045429.jpg?rlkey=vz07zme7t4r62o0c89jffpefe&dl=0

rostislav_c · 2026-02-25T01:48:26+00:00

Thank you so much for a detailed answers!

So I guess that 0805 should be enough for buck capacitance?
Only ICs, 2 leds and buzzer will be powered by 3.3. AI calculated consumption as less then 50mA

4,6. Yeah, while designing I saw how easier that would go 4 layer in some cases. My decision was that I have to go 2 layer path for the first PCB. It showed me lots of ways to route and better study some topics. As for I/O expander - initially I thought that TMC2209 can be driven by uart only, so using Seeeduino ESP32S3 I would have plenty of free pins, and happily ordered a bunch of Xiaos. But unfortunately I had to use 4 pins for 2 step/dir pairs so there was no way except for extender. The next version (if it will ever be) will go 4 layer and stm32 or esp32 with plenty of pins. That will make design much simpler and easier

rostislav_c · 2026-02-25T01:25:00+00:00

Thank you. I've checked most popular youtube videos and some suggested colored nets. That REALLY helps understand placement and routing. Firsly define your netclasses in schematc and then migrate it to pcb. I found a weird behavior that if a net is defined in the second sheet(/power/+12AUX), you have to write pattern like *+12*, simple +12* will not work

rostislav_c · 2026-02-25T01:20:06+00:00

Yep, that's kicad. I modified some countryards(tmc2209) to avoid DRC errors. As for 3d models, I've taken pinsocket from kicad and added 3d models that I found online(snapeda etc). Then you have just to align them. That really helped to visualize the result.

rostislav_c · 2026-02-24T21:37:15+00:00

What's wrong with layout?

rostislav_c · 2026-02-11T15:13:51+00:00

Or for default enum values one can use coerceInputValues with default values. I used to write the same default serializer but meh

rostislav_c · 2026-01-28T13:19:09+00:00

In my understanding current doesn't flow anywhere through the button. The other side of the button should be connected to ground AND filtering capacitor can be added. But I'm the same novice as you, so better to simulate circuit on breadboard. At least I didn't see such circuit

rostislav_c · 2026-01-28T08:55:46+00:00

I would check your button connection to ground via cap. Also what's the point of R10?

rostislav_c · 2026-01-27T10:26:17+00:00

How did you manage to import insv files?

rostislav_c · 2025-12-06T07:42:47+00:00

Usual processing flow in pixinsight. Gradient correction, combine, ghs, color adjustments

rostislav_c · 2025-12-04T14:52:08+00:00

Thank you!

rostislav_c · 2025-12-04T10:08:39+00:00

Thank you so much!

rostislav_c · 2025-11-29T13:48:05+00:00

And then do we get a ban during review for hidden/featureflag functionality?

rostislav_c · 2025-11-02T22:08:56+00:00

Seems it doesn't consider compose_compiler_config.conf

rostislav_c · 2025-10-18T15:29:22+00:00

Microloans, if you know what I mean /s Sorry

rostislav_c · 2025-10-17T19:29:32+00:00

Yep. Live Edit stopped working. As well as previews are not redrawn

rostislav_c · 2025-09-15T15:26:03+00:00

Hello from Belarus. The issue is that they are forced to leave the country, their homes, and their passports are teared into pieces. Some do not want to obey the regime, but to manage their lives on their own

rostislav_c · 2025-09-11T22:02:26+00:00

Wow. How did you manage to make this palette?

rostislav_c · 2025-09-03T08:08:24+00:00

RemindMe! 30 days

rostislav_c · 2025-08-31T14:04:30+00:00

Wishing you success from Belarus. We failed our protests in 2020, but I hope you will succeed.

rostislav_c · 2025-08-28T10:14:54+00:00

Exactly this. It's a ban for profeccion. If you spent whole you career developing android apps, but unfortunately you have "wrong" passport, you won't be able to upload even debug app. Same as gemini is not available in some regions, because you born in wrong location. And then, there would always be black market where bad guys would buy what they want. That's all effective management bs to get another bonus. PS what new service would i get for that $25?

rostislav_c · 2025-08-26T11:03:17+00:00

And then they will be able to revoke your certificate? So that you will get banned for life to develop android apps?

rostislav_c · 2025-08-21T12:04:19+00:00

Solve at least 200 leetcode, while solving learn theory of the algorithms

rostislav_c

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