All Questions
20 questions
0
votes
2answers
239 views
Minimum spacing between PCB components
I am laying out a 2-layer PCB that has only through hole components, and I need it to be as small as possible. I was wondering how small I can set the clearance rule between the components? When I ...
1
vote
0answers
99 views
Trace clearance for 500V insulation test
Part of my job is to measure insulation resistance of cables using a tester, such as a Fluke 1587. We measure insulation resistance at 500 VDC. We have to measure insulation resistance pin to pin and ...
0
votes
1answer
146 views
为保护环垫非常接近,没有空间吗?What should I do?
Introduction to the problem I use an OpAmp to buffer the output of an InAmp and to drive the input of an ADC, so the signal path looks basically like this: InAmp -> OpAmp -> ADC The device of ...
1
vote
1answer
1k views
Altium: how to assign a net class to unconnected pins?
I have PCB with a clearance rule for nets that can be exposed for higher voltages: In the schematic I put a blanket around the area I need to be assigned as higher voltages nets (I called this class "...
0
votes
2answers
130 views
Isolating main power traces on backside of the PCB
I am currently making a build-in PSU for my own audio-effect-rack-thing. The internal PSU consists of two print-transformers(THT), one for 6VAC and the second one for 9VAC. These are also pretty low ...
2
votes
2answers
792 views
Maximum allowable voltage between PCB traces
I have some confusion regarding the guidelines for clearance between surface uncoated PCB traces (specifically component pads). IPC-2221 guidelines and other guidelines and standards indicate spacings ...
1
vote
2answers
565 views
Creepage distance over pcb
How to measure creepage distance over pcb ? Is creepage and clearance distance measure by pbc layout or soldering?
0
votes
2answers
790 views
Cleaning up GND/PWR-plane air wire errors in EAGLE + bonus questions
So I've just finished up my first complete PCB board. The layout is 4-layer based, set up as ((1*2)*(15*16)) ---not sure if it should be ((1+2)*(15+16)) or ((1*2)+(15*16)) instead, please advise--- ...
2
votes
1answer
643 views
Altium individual clearance for polygonpour
I want to use a poured plane in my design, but i need more clearance on the bigger pads. If i increase the clearance in the rules, all the spaces between pads, will increase. Is there a way to specify,...
0
votes
1answer
1k views
minimum trace spacing error
A PCB made with KiCad has a configured clearance of 0.152 (6mil) but when I send it to JLC site I have this warning: "Attention please, the minimum trace spacing is out of our capability, your order ...
1
vote
1answer
111 views
What's the name of the Altium designer rule that warns if component “enters” another component area (PCB)?
麻烦的是,这个电路板电容垫nd needs to stay inside the other component square area. What's the Altium rule to exclude this component?
2
votes
0answers
219 views
Becoming crazy with EU LVD regulation in PCB and electric strength
First of all I will explain the design characteristics of my project to make clear what it is and where it enters for regulation. It is a fixed electric/electronic installation in offices so it can'...
-1
votes
1answer
478 views
Altium trace Clearance auto finder (based on ANSI / IPC-2221/IPC-2221A standards)?
我需要做一个领导PCB巷道上杉达也ting using SO i have designed my schematic into Altium designer V16, like this (single side ): So according ANSI / IPC-2221/IPC-2221A design standards for My ...
1
vote
1answer
480 views
Clearance distance in a PCB with an insulated barrier
In the image shown below, why is the distance marked with "??" not considered for clearance? Is there a slot under that barrier, or does the barrier pass through the PCB?
8
votes
2answers
2k views
Will a cut or a slot in a PCB change clearance or creepage?
Does a cut or a slot in a printed circuit board increase clearance, creepage or both? Some say it will increase clearance, but I don't think clearance will change because, even with a cut in the PCB, ...
