Author Topic: Is not using a GND pour on purpose a bad habbit?  (Read 313 times)

0 Members and 1 Guest are viewing this topic.

Offline bjdhjy888

  • Regular Contributor
  • *
  • Posts: 60
  • Country: ca
Is not using a GND pour on purpose a bad habbit?
« on: September 24, 2019, 01:08:05 am »
I know it's good to use a ground pour, but I found a PCB with no GND pour would have a clearer view of the wires on the board, thus, it would be easier for me to debug it, cutting wires or soldering flying wires.

It would be more difficult for me to do so if there were a GND pour.

Is this a good thing to do?
 ::)
« Last Edit: September 24, 2019, 01:24:39 am by bjdhjy888 »
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 16372
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Is not using GND pour on purpose a bad habbit?
« Reply #1 on: September 24, 2019, 01:16:36 am »
The type of circuit and its particular sensitivities matters however for debugging place some copper text next to the important nets and/or some SMD test points to hook probes directly to.

These fit nicely onto a 0805 footprint and you can recycle them after your prototype work is done.



https://www.digikey.co.nz/product-detail/en/keystone-electronics/5015/36-5015CT-ND/278886
Buy them in bulk and sell some to friends to keep the costs down.
Avid Rabid Hobbyist
 
The following users thanked this post: bjdhjy888

Offline Neilm

  • Super Contributor
  • ***
  • Posts: 1435
  • Country: gb
Re: Is not using a GND pour on purpose a bad habbit?
« Reply #2 on: September 24, 2019, 06:54:50 pm »
Depending on the application I have found a ground pour can cause more issues than it solves.
Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. - Albert Einstein
Tesla referral code https://ts.la/neil53539
 

Online daqq

  • Super Contributor
  • ***
  • Posts: 1603
  • Country: sk
    • My site
Re: Is not using a GND pour on purpose a bad habbit?
« Reply #3 on: September 24, 2019, 08:26:48 pm »
Quote
I know it's good to use a ground pour,
Depends. At the end of the day it has to do with signal integrity and current return paths.

A copper pour in an internal layer is an invaluable tool for high speed design - and high speed design these days includes basic MCUs, where a rising edge can be in the few ns order.

Per rule of thumb it helps, or at least does not do harm... but.

Depending on the application, a poorly though through copper pour can even create unwanted current paths that will affect your application in a negative way.

It's simply a tool, neither good, nor bad.

Relevant reading: https://www.analog.com/en/analog-dialogue/articles/staying-well-grounded.html
(there are many other good texts)
Believe it or not, pointy haired people do exist!
+++Divide By Cucumber Error. Please Reinstall Universe And Reboot +++
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf