Electronics > Projects, Designs, and Technical Stuff

PCB design practise

<< < (3/3)

silvestron:

--- Quote from: BrianHG on August 07, 2020, 03:50:42 am ---This should be a manual route job anyways.  It is easy enough in KiCad to cut a part of a tread and manual route one.  For this PCB, I would target a minimum width of 10-12mil as the PCB manufacturer can easily do 5-6mil on the cheapest junk.

--- End quote ---
Figured out a way to get it sorted and have routed as such. Thanks for your feedback Brian, it's been invaluable!


--- Quote from: BrianHG on August 07, 2020, 03:30:54 am ---I also seriously question the practice of placing vias directly underneath SMD pads, especially for such a simple design and especially when sourcing cheap economic PCBs with their larger drill hole diameters.  With the same layout as V3 and getting rid of those few bottom traces, you have the spare room and it is not needed at all.

--- End quote ---
As noted earlier, I've typically steered away from it too, but was rethinking from a previous commenter. Just looking up I've noticed that my fab of choice (JLCPCB) won't do via-in-pad anyway, so I went back to having the GND vias separated. Have been able to route everything except GND on the top layer!

BrianHG:
Ok, just center the trace under R3.

Since you will be soldering a pin or wires, 4 vias for the GND pin #2 is fine.

To add structural support for the Vin and 5v Vout, paint in a big huge rectangle of copper horizontally and vertically, yet still leave a reasonable amount of clearance.  You do not need to go too close to adjacent tracks.  In fact, the best structural support would be not 2 or 4 vias, but a pad hole big enough to accommodate something like a .1 inch space sip connector pins.

The rest is fine.

maybe also move up R3 ever so slightly so the feedback pin with it's 75k impedance isn't right up against the switching side of the inductor.

Navigation

[0] Message Index

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod