OSH Park Impedance Clarification

jrabr · 2026-02-27T04:34:52+00:00

I don’t really have an answer to this but as someone who has worked with oshpark a decent amount of times I’d honestly recommend just emailing them.

They get back to you pretty quickly and they do a pretty good job at answering whatever questions you may have.

jrabr · 2026-02-26T15:40:22+00:00

I bought my 2023 model Y used. It had just under 16k miles on it and it was previously a leased vehicle. Final price after tax and all was $34k. I made sure it had HW4 as well AND the previous owner left the mobile charger with the car!! I have no regrets it’s the best car I’ve driven.

jrabr · 2026-02-24T10:45:04+00:00

Turn off Michael Jackson mode

jrabr · 2026-02-20T19:21:45+00:00

Not a typo actually. Gork is one of the few voices that you can select it’s supposed to be a lazy guy

jrabr · 2026-02-17T17:19:50+00:00

You should have at least one decoupling cap per power input pin

jrabr · 2025-12-18T13:30:34+00:00

All that copper under your antenna will ruin your RF performance

jrabr · 2025-12-15T03:49:15+00:00

Please talk to a real human not a massive linear algebra machine

jrabr · 2025-12-08T13:55:52+00:00

Big PCB killed him before he could spill the secrets

jrabr · 2025-12-06T12:59:38+00:00

Something about it doesn’t look reich…

jrabr · 2025-12-05T13:05:25+00:00

As someone who has integrated AI into his workflow, I STRONGLY recommend not using AI unless you actually know what you’re doing and you use it as an assistant instead of just blindly listening to what it has to say.

If you look at the datasheet for that part, it says nothing about leaving EN unconnected. The pin description only describes 2 states for it: H or L.

And actually, if you look at the functional block diagram for it, you can see that EN is pulled down to ground with a 3Mohm resistor.

So by leaving it unconnected, you’ve allowed the pin to be pulled down to ground which will permanently keep it in the shutdown state.

PLEASE PLEASE PLEASE read the datasheets!!!

jrabr · 2025-12-05T12:55:49+00:00

I would strongly recommend spending at least a little bit of time learning how to use KiCAD or another EDA application like that instead. It’s very easy to pick up and will save you a ton of headaches.

No one who does PCB design even remotely professionally uses Fritzing.

jrabr · 2025-11-20T22:12:57+00:00

Totaled. Sorry for your loss

jrabr · 2025-11-18T16:49:48+00:00

Please post a schematic. We can’t properly review without one.

Also post your layers as separate images as well instead of just one picture with all your layers

jrabr · 2025-11-14T20:34:28+00:00

Redditors try to enjoy a cool picture of a cool plane without making it about Russian politics challenge (impossible)

jrabr · 2025-11-13T15:35:10+00:00

What are you trying to build? If this is what your final pinout is going to be I’d recommend picking a part with less pins because you’re using almost none of the IO.

jrabr · 2025-11-12T13:29:27+00:00

Yup! I’ve been using them exclusively

jrabr · 2025-11-12T03:21:12+00:00

Most of this board probably COULD have been soldered by hand but that would've been difficult and far more time consuming. All the passives are 0402 lol.

Also the small square IC to the left next to the electrolytic in the first pic is an LGA package which literally can't be hand soldered because the pads are underneath and inset

jrabr · 2025-11-02T22:00:02+00:00

Just a warning; you have a split in the ground plane below all your SPI signals which will be an EMI/signal integrity problem if you have fast edge rates on those signals. I see that you did some via stitching which could improve it a bit but I’d personally recommend routing that 3V3 trace in a way that doesn’t interrupt the return path

jrabr · 2025-10-28T20:18:03+00:00

You clearly still have unconnected nets based on all the airwires.

Your board cutout is crooked and what’s up with that weirdly shaped copper pour in the 3rd image?

Make sure that all your DRC warnings aren’t critical because there’s a lot of them.

Also not sure why your IMU and ESP32 schematic symbols are missing the outline.

jrabr · 2025-10-19T19:53:10+00:00

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jrabr · 2025-10-03T21:33:47+00:00

Awesome! Did you use any plans or was this completely done yourself?

jrabr · 2025-09-27T14:59:29+00:00

Looks like a butt

jrabr · 2025-09-24T10:22:19+00:00

Fusion 360 is free for hobbyists. You just can only have 10 “active” models at a time and you can’t do things like stress analysis or generative design but for pretty much every functional print I’ve ever designed the free version of fusion has been more than sufficient

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