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Why am not able to get a grasp of PCB designing?

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redgear:

--- Quote from: james_s on November 13, 2019, 06:46:09 am ---Maybe try some simpler PCBs first to get the hang of it? Lay out some stuff like 555 and transistor multivibrator LED blinkers, op-amp circuits, just easy stuff with a handful of components. Once you get the hang of the process it gets easier.

--- End quote ---
Ok, I will do that if I don't make any progress today.


--- Quote ---Some people are also just better at visualizing spacial relationships, PCB layout came quite naturally to me but I've seen a lot of people struggle with it.

--- End quote ---
I'm honestly bad at those.

Btw, I placed a No connection flag on a capacitor but it has still populated on the PCB new.  :-//

tautech:

--- Quote from: redgear on November 13, 2019, 06:45:48 am ---I have disabled ratsnet right now and started grouping components as per the schematic. Will post it once i am done for review

--- End quote ---
Don't, you need it to help visualize future routing.
While it seems like a curse and only confuses you it's a very valuable part of getting a PCB layout right.

tautech:
Watch Dave:

redgear:

--- Quote from: blueskull on November 13, 2019, 07:17:10 am ---FYI, the usual way I layout is to estimate total PCB size and shape (based on component size, PCB process and design target), place all parts outside PCB area, group parts by affinity and function, drag parts of vicinity to PCB area, arrange those parts, and repeat for other function blocks.

Once I have all parts roughly placed, I'll optimize the placement to effectively use boarder spaces between blocks and to make room for routing. This is the longest part. I always believe one should spend more time on placement than routing.

If you did a good job on placement, you should be able to visually see the routing even if they do not exist, so the remaining job is to just place tracks following what you can see.

There are always routing intensive parts that you can't see the way they are connected before the connection is done, and those are what you have to spend more time on layout than placement, but unless you mess with DDR memory or other massively parallel high speed buses, you will almost never encounter such cases.

--- End quote ---
I tried placing the parts as they were in the schematic, based on affinity and functionality, I wasn't able to route all traces. Should I connect the traces and place them inside the pcb?


--- Quote from: tautech on November 13, 2019, 07:22:01 am ---Don't, you need it to help visualize future routing.
While it seems like a curse and only confuses you it's a very valuable part of getting a PCB layout right.

--- End quote ---
I felt it was easier to arrange the components that way. But the routing became a problem.

tautech:

--- Quote from: redgear on November 13, 2019, 09:57:27 am ---
--- Quote from: tautech on November 13, 2019, 07:22:01 am ---Don't, you need it to help visualize future routing.
While it seems like a curse and only confuses you it's a very valuable part of getting a PCB layout right.

--- End quote ---
I felt it was easier to arrange the components that way. But the routing became a problem.

--- End quote ---
:)
It always is !
More layers if there is no other way but there are tricks like using bigger passives so to be able to route traces under them. Jumper wires and zero ohm links are other tricks.

Show us your efforts.

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