Brian GT's LM4780 PCB layout

D_GR8_1 · 27th February 2005, 10:30 PM

Ok, so here's the story:

over the weekend I spent many hours trying to implement Brian's schematic for the LM4780 onto a PCB.

It is a very tedious & frustrating process.

BrianGT, is it possible to make this PCB available in a pdf as you have done so many times in the past.

I know PD said that he had it somewhere in his files, and it wasn't in a pdf format, but I would really appreciate it if you guys could make this available.

Thanks!

peranders · 28th February 2005, 06:00 AM

... you haven't thought of buying a pcb, then you will get a 100% correct pcb with plated through holes. Brian isn't charging particulary much for it.

Gcollier · 1st March 2005, 03:25 AM

I spent a few hours myself converting the PDF version into an Eagle file, I'd share it but I really dont feel that would be ethical, or fair to Brian and the rest of the group responsible for it's design. As Peranders suggested, if you do them yourself you won't have plated through holes...unless your PCB making skills are better than mine, anyway that problem can be solved by placing a few vias next to a few pins, and soldering a pice of wire between them. I have also seen small gromets that are available to make plated vias, but have not tried them myself. I was also wondering if one could use a conductive pen to fill the through holes

Anyway if you search through the original thread you will find the PCB files in PDF format, as well as several good screenshots than can be used to make your own.

Good Luck!

D_GR8_1 · 1st March 2005, 04:27 AM

Why would I need plated through holes?

If you solder the component from both sides of the board isn't it the same?

Also, Gcollier, I think you are referring to the schematic pdf which has the initial design without the MUTE & Zobel.

I already have that one.

I mean, no big deal, I just thought that since the design of the PCB was discussed and created in these forums, we would have at least have access to a pdf, i'm not asking for the gerbers now, am I?

BrianGT · 1st March 2005, 06:18 AM

Here is a pdf of the layout. Red = top layer

(had to split it up into a file for the top layer and a file for the bottom layer due to file size)

--
Brian

BrianGT · 1st March 2005, 06:19 AM

Green = bottom layer

--
Brian

D_GR8_1 · 1st March 2005, 07:42 AM

Thanks Brian.

You're a LEGEND!

Gcollier · 1st March 2005, 08:00 PM

Quote:

Originally posted by D_GR8_1
Why would I need plated through holes?

If you solder the component from both sides of the board isn't it the same?

Hmmm...have you looked at the pin spacing on the LM4780...how do you intend to solder the pins on the topside of the PCB that are below the chip (the back row). If you find a way let me know and I can do away with a few vias.

Good luck with the project!

D_GR8_1 · 3rd March 2005, 02:43 AM

I'm a bit confused here.

Which side do I print as it is & which one do I flip horizontally?!?

Peter Daniel · 3rd March 2005, 03:36 AM

You flip the second image

27th February 2005, 10:30 PM	#1
D_GR8_1 diyAudio Member Join Date: Aug 2004 Location: Sydney	Brian GT's LM4780 PCB layout Ok, so here's the story: over the weekend I spent many hours trying to implement Brian's schematic for the LM4780 onto a PCB. It is a very tedious & frustrating process. BrianGT, is it possible to make this PCB available in a pdf as you have done so many times in the past. I know PD said that he had it somewhere in his files, and it wasn't in a pdf format, but I would really appreciate it if you guys could make this available. Thanks! __________________ An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

28th February 2005, 06:00 AM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	... you haven't thought of buying a pcb, then you will get a 100% correct pcb with plated through holes. Brian isn't charging particulary much for it. __________________ /Per-Anders (my first name) or P-A as my friends call me

1st March 2005, 03:25 AM	#3
Gcollier diyAudio Member Join Date: Mar 2003 Location: Windsor	I spent a few hours myself converting the PDF version into an Eagle file, I'd share it but I really dont feel that would be ethical, or fair to Brian and the rest of the group responsible for it's design. As Peranders suggested, if you do them yourself you won't have plated through holes...unless your PCB making skills are better than mine, anyway that problem can be solved by placing a few vias next to a few pins, and soldering a pice of wire between them. I have also seen small gromets that are available to make plated vias, but have not tried them myself. I was also wondering if one could use a conductive pen to fill the through holes Anyway if you search through the original thread you will find the PCB files in PDF format, as well as several good screenshots than can be used to make your own. Good Luck! __________________ If you take something apart and put it back together again enough times, eventually you will have two of them.

1st March 2005, 04:27 AM	#4
D_GR8_1 diyAudio Member Join Date: Aug 2004 Location: Sydney	Why would I need plated through holes? If you solder the component from both sides of the board isn't it the same? Also, Gcollier, I think you are referring to the schematic pdf which has the initial design without the MUTE & Zobel. I already have that one. I mean, no big deal, I just thought that since the design of the PCB was discussed and created in these forums, we would have at least have access to a pdf, i'm not asking for the gerbers now, am I? __________________ An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

1st March 2005, 07:42 AM	#7
D_GR8_1 diyAudio Member Join Date: Aug 2004 Location: Sydney	Thanks Brian. You're a LEGEND! __________________ An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.


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3rd March 2005, 02:43 AM	#9
D_GR8_1 diyAudio Member Join Date: Aug 2004 Location: Sydney	I'm a bit confused here. Which side do I print as it is & which one do I flip horizontally?!? __________________ An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

3rd March 2005, 03:36 AM	#10
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	You flip the second image __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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