My frist PCB Design

Hi, I'm anson! I just start an internship in the Small startup in HK. And I just made my first PCB design for our company propject!

So i'm looking for some advices online about that PCB I made...

It's a small embedded system drive by ESP32-S2-mini-1U module, which have 3 sensor in it
1. GPS module (ATGM336H)
2. radar sensor (VL53l5CX)
3. Accelerometers (MPU6050)

I am not familiar design a PCB. I would like to ask am i making some common design flaws?
and what do I do to keep in mind when I am designing one of thses??
like design convention, some basic knowledge, tips...

I know I absolutely will make some mistake.

So please help my have a look on this project if you interested.
and welcome any comment and tutoral recommardation 'cause im still a nob

Thank you very much!

This is the gitHub link of my EasyEDA std design!

https://github.com/ToastTO/LittleBoss.git

Top Replies

Chuitoto over 2 years ago

github.com/.../LittleBoss.git
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shabaz over 2 years ago

Hi,

It might work, but performance could be better. Is this really a 2-layer board, or 4-layer? If 4-layer, where are the screenshots of the inner layers?

Also, is there a PDF of the schematic?

And finally, how are you intending to build this, you have two quite complicated footprints directly on opposite sides of the boards, one of them only has pads completely on the underside of it, so presuming you have a reflow oven or will get this assembled?
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colporteur over 2 years ago

How is the PCB going to be mounted? I don't see any through holes.
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shabaz over 2 years ago

Also, while we are criticizing (in a friendly way), there's no power connection, is it going to be powered via the USB connector?

Plus, it's hard to see the top and bottom silkscreen because I think you've mixed the layers. I can't see the pin 1 markings on a couple of the chips.

Unless it absolutely needs to be that size (which makes no sense if it needs to be tethered by a USB-C cable for power anyway, unless you are trying to fit it into a specific enclosure) it could be better for a first board to make it larger, maybe use a normal-sized ESP-32 that can be hand-soldered and easily probed, since your first revision board may have bugs to iron out anyway. For instance, then you can have pin headers for (say) probing I2C and so on.

That accelerometer you're using is obsolete from memory so it might be worth changing it, or making sure you have enough stock of it.
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colporteur over 2 years ago in reply to shabaz

served the same thing. I thought it was with the USB-C. Appears to be a small cap across the PS input (good).
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geralds over 2 years ago

Hi,

... just some thoughts about...

Best regards

Gerald

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shabaz over 2 years ago

The components can likely all fit on one side:

Perhaps one or two passive components might need to go to the other side, but it doesn't seem like it.

This will be cheaper to manufacture, and overall thinner if the size is important to you.
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