Briarios wrote: ↑
Fri Oct 13, 2017 11:11 am
I used 4 layer PCB because of me seeing the usb and ethernet lines be almost to their exact ohm specs while being relatively thin and not taking up alot of space on the PCB compared to 2 layer, plus the 2 middle layers is ground and ground only so the 2 outer layers are for all the lines.
not sure if this makes sense but i am no engineer and this seemed logical for me to do.
So to sum up, you have used the layers like the following:
Layer 1 (top): traces for everything
Layer 2 (middle): GND
Layer 3 (middle) GND
Layer 4 (bottom): traces for everything
So in this case your only benefit with the 4 layers setup (compared to 2 layers) were that you did not need to route GNDs to everywhere?
(and since you saved space, you could route the USB and ETH on the top and bottom layers completely?)
My understanding would be this.
Is that correct?
Thanks very much!