All Questions
Tagged with pcb-fabrication layout
11
questions
8
votes
1
answer
563
views
Pie shaped stubs in RF supply PCB layout
In a recent question there is a photo of a RF PCB
And it shows several pie shaped pads on the supply end of the biasing network.
How are these pads designed. Is there a rule of thumb for the two ...
- 2,216
3
votes
1
answer
522
views
Two layer PCB vs. four layer PCB for simple design with 30A current
I have a design which is literally just 2 connectors (input and output), a relay and a diode. Basically using the relay to connect a charger to a battery.
The board size is predetermined and I can't ...
- 757
0
votes
1
answer
1k
views
ESP32 Pad 39 - Where do I add vias?
I am building my first PCB ever with an ESP32. I want the PCB to be built by JLCPCB (or similar) and I am not sure what to do with the Pad39
I read these opinions:
Do not add vias in pad, and if you ...
- 1,234
0
votes
1
answer
118
views
copper balancing poly on 4 layer PCB
i am designing the 4 layer pcb for the first time. I got typical 4 layer stackup - signal on the top, GND, PWR, signal on the bottom
Most of the signals are routed on top, few are on bottom, and ...
0
votes
1
answer
110
views
Tie via stitching and fencing to GND
I know that via stitching requires me to assign my vias to a signal (like GND pours on top and bottom layers).
Do I need to assign signals to the vias in order to "fence" routed nets, for ...
- 173
1
vote
3
answers
507
views
Plated PCB Hole Shorting Power to GND?
I’ve been soldering components to my PCB; all has been good, but recently, after soldering a big electrolytic through hole cap, the power and gnd plane were shorted. This persisted even after removing ...
- 288
25
votes
6
answers
10k
views
Have I placed too much on this PCB layout?
I am doing my first PCB layout (using Altium) and have finally gotten past the auto-router stage. The result is a mess and there are some missing nets and design rule violations. Have I packed too ...
- 937
2
votes
2
answers
4k
views
What is the general rule of thumb regarding UL's creepage clearance regulation?
I've read a whole bunch of material but I'm still quite confused regarding creepage clearance, specifically:
How to calculate the minimal clearance on a PCB board?
How to calculate the width of the ...
- 371
7
votes
2
answers
965
views
PCB Panelization tool/SW and adding test connections
I prepared 4 different PCB layouts on Eagle CAD and generated Gerber files. As I can see Eagle CAD doesn't have any option to panelization.
Is there any free tool/program that can allow me to ...
- 3,305
4
votes
2
answers
1k
views
Questions About PCBs
I understand what they are but i have a few questions...
What are the multi layers on a pcb (i understand 1 and 2 is front back but what about 3, 4 ,5 etc.)
In http://www.youtube.com/watch?v=...
- 85
7
votes
5
answers
17k
views
How close is too close for traces on a PCB?
Are these traces too close for conventional PCB manufacture? DRC check advises against it, but I haven't filled out all the settings for it.
For scale, the resistors are all 0603.
- 31.9k