part auto placement?
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Josj Landon 1 week ago
so i was just curious if there has been any thoughts on component placement... like on diptrace when you convert schematic to pcb you can set where you want your main components and then click the run auto placement and all the components align to the where they should be... because currently whenever i convert from schematic to pcb my components are spread from one end of the map to the other.literally.even zoomed all the way out i still cannot see the components, just the ratlines.... at the very least have a button to collect components outside of the board outline and center them,, maybe im missing something idk =D id post screenshots but i dont see that option..
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andyfierman 1 week ago
Please see: [https://easyeda.com/forum/topic/Component-autoplacement-into-PCB-3f0f310db0d74a9bbf848953c4c8048d](https://easyeda.com/forum/topic/Component-autoplacement-into-PCB-3f0f310db0d74a9bbf848953c4c8048d) To do a whole board do CTRL+A (Select All) then do CTRL+SHIFT+X. * Your PCB must have been saved before this will work.
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Josj Landon 6 days ago
ahh sweet, that is better for sure.. so does that mean this is as far as its going to be implemented? im not complaining because imo easy eda is a really good program.. trying to go from other programs and use jl smt service is a real pain!! i hate that im even saying this because every time i see comments like this i yell well go use {enter eda name here}if you love it so much.. lol but in diptrace the function runs like auto router but just places the components closer and closer and swaps them around to be in the best spot. is something of this sort a thought?
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Josj Landon 6 days ago
just wandering why it still places everythingso far apart
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andyfierman 6 days ago
@josjlandon, @Usersupport, Having an autoplacement scheme work a bit like an autorouter where it just places the components closer and closer and swaps them around to be in the best spot sounds like a nice idea. That would make a very good addon for the new PCB version. In fact an autoplacer really needs to work together with an autorouter. However, as I keep warning people about using an autorouter: it is possible to get a completely rubbish PCB from an autorouter and the same would apply to an autoplacer. Component placement and routing are subject to so many rules (Signal Integrity, Power Integrity, EMC, Thermal Integrity) that it is extremely hard to describe them all to - and successfully implement them all in -an autoplacer/router system in such a way that you get a PCB that actually meets those rules.
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Josj Landon 6 days ago
i was kind of thinking that about the auto router i didnt even know that was a thing till i recently downloaded dip and then when i jumped back on easy i saw that option.. i cant even begin to explain the amount of hours spent manually tracing out a board for the computer to do it in seconds, and you say that about the auto router but i dont know sqaut about any of that..lol so surely it can do a better job for the most part right?
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andyfierman 6 days ago
"...surely it can do a better job for the most part right?" I used it successfully on a low speed digital board (CMOS 4000 series running at 32kHz) a few months back. It routed so quickly that I could try out several different ideas and manually adjust the routing to get continuity in my ground and power copper areas and still be home in time for ham sandwiches and lashings of ginger beer. However, for RF, high speed digital, high power switching supplies and low noise mixed signal it can easily end up being a very costly total disaster. With careful use, an autorouter (and by the same arguments, an autoplacer) can be very helpful but it should never be seen as a replacement for good practice and experience in PCB layout. :)
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Josj Landon 6 days ago
thank you i guess i have some more reading to do somewhere lol thereis so much mixed info on the web about pcbs its ridiculous iv been trying to build a radiation survey meter as small as possible which is low current but high voltage should i be using copper pours
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andyfierman 6 days ago
For PCB guidance: [https://docs.google.com/document/d/1CU7RuPyFlSZPzWBN-YZ0x87xeAB4xpLdLaIsUwhLj_M/edit?usp=sharing](https://docs.google.com/document/d/1CU7RuPyFlSZPzWBN-YZ0x87xeAB4xpLdLaIsUwhLj_M/edit?usp=sharing) and then these are OK follow-on tutorials: [https://server\.ibfriedrich\.com/wiki/ibfwikien/images/d/da/PCB\_Layout\_Tutorial\_e\.pdf](https://server.ibfriedrich.com/wiki/ibfwikien/images/d/da/PCB_Layout_Tutorial_e.pdf) [https://www.edn.com/pcb-design-basics-example-design-flow/](https://www.edn.com/pcb-design-basics-example-design-flow/) [https://www.edn.com/component-placement-tips-and-strategies/](https://www.edn.com/component-placement-tips-and-strategies/) [https://www.smps.us/pcb-design.html](https://www.smps.us/pcb-design.html) [https://www.smps.us/layout.html](https://www.smps.us/layout.html) which also links to this very detailed tutorial: [https://www.analog.com/media/en/training-seminars/design-handbooks/Basic-Linear-Design/Chapter12.pdf](https://www.analog.com/media/en/training-seminars/design-handbooks/Basic-Linear-Design/Chapter12.pdf) which is part of this fantastic free book: [https://www.analog.com/en/education/education-library/linear-circuit-design-handbook.html](https://www.analog.com/en/education/education-library/linear-circuit-design-handbook.html) See also my post in: [https://easyeda\.com/forum/topic/When\_How\_to\_use\_Copper\_Ground\_and\_V\_planes\-g2QNnljhf](https://easyeda.com/forum/topic/When_How_to_use_Copper_Ground_and_V_planes-g2QNnljhf)
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