Comment by bongodongobob 5 days ago
Yeah, you have to read the data sheets. Beyond that, use decoupling caps for all power pins, as close to the chip as you can, and make one side of the PCB a ground plane. These 2 things should solve most of your issues.
Based on seeing lots of beginners (me, too, at one time) do ground planes wrong, this video may help:
https://www.youtube.com/watch?v=EEb_0dja8tE&t=746s
Hans Rosenburg explains some tricky concepts very clearly. The upshot is
a) 4 layer boards are much easier to get right
b) you really need an unbroken ground plane for return currents. This is often incompatible with having just two layers.
c) putting the ground plane much closer to the protected signals is a really good thing. Again, that means 4 layer boards.
Excellent, thank you. I already do the plane, but not the caps. Thanks!