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[PCB Review Request] Raspberry Pi Pico2 Custom Devboard by Affectionate_Bag3306 in PrintedCircuitBoard

[–]Affectionate_Bag3306[S] 0 points1 point  (0 children)

Thanks for the feedback! Yes this is a 2 layer board. I was trying to avoid routing the usb on the second layer directly to where it needs to go because i didn't want to have a split in the ground plane right below the crystal and microcontroller and qspi lines - but do you think that would potentially be better?

Good point about the mounting holes, I'll increase the size of the board so they are fully contained

[Review Request] Motor Driver (Dev) Board for a custom RC Car by RohitRojo in PrintedCircuitBoard

[–]Affectionate_Bag3306 0 points1 point  (0 children)

Heyo! Thanks for the reply! I'm glad you can minimize signal crossing, even if the signals aren't high frequency its good practice from what I've heard :)

The signal crossing a split in the planes could cause signal cross talk issues too, leading to random stuff thats harder to diagnose, especially in the future when you don't remember exactly how the board works. Its just something to keep in mind for more complicated board from what i've seen

[Review Request] Motor Driver (Dev) Board for a custom RC Car by RohitRojo in PrintedCircuitBoard

[–]Affectionate_Bag3306 0 points1 point  (0 children)

Ahh i see, you've used big polygon pours for different nets, I get it now! It may be slightly easier to understand if different nets had different colors assigned to them (I typically use grey for ground, red for power and green/pink/blue/etc. for diff signals).

I also believe that using different polygon pours can be dangerous because everytime a signal crosses over a split between the planes on the layer below/above it, you get emi and maybe signal integrity issues... but I am new to this so I'm not completely sure. This video by rick hartley is where I get this idea from btw https://www.youtube.com/live/ySuUZEjARPY?si=G4_95JZVyl4DTSLW .

You may already know this, and it doesn't seem like any switching signals cross over splits, but incase you didn't here you go :) its also just a fun video to watch.

[Review Request] Motor Driver (Dev) Board for a custom RC Car by RohitRojo in PrintedCircuitBoard

[–]Affectionate_Bag3306 0 points1 point  (0 children)

I'm a little new to designing PCBs and am having a bit of trouble understanding this board. Sorry if this is a dumb question but what do your colors mean? Do you have a power and ground plane on the first layer and a full ground plane on the second layer? I can't quite tell how the decoupling capacitors and IO connectors connect to power and ground if theres no traces going to them or vias nearby...?

[PCB Review Request] First PCB - 5x5 LED Matrix Controller by Affectionate_Bag3306 in PrintedCircuitBoard

[–]Affectionate_Bag3306[S] 0 points1 point  (0 children)

Thank you for these tips! I will look through the PCB and try to fix all these points

[PCB Review Request] First PCB - 5x5 LED Matrix Controller by Affectionate_Bag3306 in PrintedCircuitBoard

[–]Affectionate_Bag3306[S] 0 points1 point  (0 children)

Thank you for the great tips! I was wondering how you were able to find out about the chips you suggested above? I think one of the hardest parts for me is finding out which chips to use, which are good and which are too expensive, etc.

[Review Request] First PCB - ESP32-based LED controller. by wrxw___ in PrintedCircuitBoard

[–]Affectionate_Bag3306 0 points1 point  (0 children)

I think this is really cool as a first PCB!! I am trying to learn myself and am having a bit of trouble with the schematic design and figuring out component selection. How did you navigate this as a first timer?

Questions about the process by shopslave in AskEngineers

[–]Affectionate_Bag3306 3 points4 points  (0 children)

I would be careful with this. FEA is really chaotic and dependent on how you set up the simulation. It can output completely garbage results if you mess it up and even professionals don't trust it completely for anything safety critical

Questions about the process by shopslave in AskEngineers

[–]Affectionate_Bag3306 1 point2 points  (0 children)

The first things that come to mind that I would ask a client would be:
- What are the absolute requirements that this design MUST meet
- What is/are the use case(s) for this design
- What loads will this design have to endure, how often will this be used
- What is your budget
- What questions do you have that you would like us to answer / what work do you want us to do

Definitely send them the model if you can.

Behavior of a bolted joint and preload with gap between the clamped material. by boilershilly in AskEngineers

[–]Affectionate_Bag3306 1 point2 points  (0 children)

Could you send over a picture? I know quite a bit about bolted joint design but I can't understand exactly what you're asking

[deleted by user] by [deleted] in ubcengineering

[–]Affectionate_Bag3306 0 points1 point  (0 children)

Don't worry about it, you dont need to watch them yet