LM3886 and LM4780 Eagle outlines

Bob0513 · 2nd November 2006, 07:24 AM

Does anyone have the component outlines for the LM3886 and/or LM4780. The library on cadsoft.de that has the components is bad.

pinkmouse · 2nd November 2006, 08:23 AM

Search for my single sided LM4780 PCB thread. I posted the Eagle files so it has the appropriate footprint there.

CJ900RR · 2nd November 2006, 10:36 AM

If you find some eagle lbr for the 3886/3875 made by a Andrew or something simulare, dont remember exactly, do NOT use it.

It has the wrong hole-size AND wrong pitch (disstance between the legs). I used it for my boards and had to drill and mixture alot to fit my LM3875 in to it.

diarav · 2nd November 2006, 11:58 AM

If you are talking about lmopamp.lbr file, then I had no problems using the LM3886 outline on the board. Fitted perfectly. The pitch is ok. If this is the problem, perhaps you can check if your printing dimensions are coming out fine.

There is a problem with the schematic however. Some pins (I think 8, 4, 5 ) dont "connect" as they were not aligned with the grid. I manually edited the schematic for LM3886 and fixed this.

CJ900RR · 2nd November 2006, 03:52 PM

Quote:

Originally posted by diarav
If you are talking about lmopamp.lbr file, then I had no problems using the LM3886 outline on the board. Fitted perfectly. The pitch is ok. If this is the problem, perhaps you can check if your printing dimensions are coming out fine.

There is a problem with the schematic however. Some pins (I think 8, 4, 5 ) dont "connect" as they were not aligned with the grid. I manually edited the schematic for LM3886 and fixed this.

No I dont think it was that one. But I am not shure. In Eagle's library-list it was named "Andrew custom" I think..

The files was send to a real PCB manufacturing company, a company that deliver weekly to my work, and we never have any problems with their quality. And everything else on the PCB was correct, so my guess is still that it was the library.

anbello · 3rd November 2006, 04:44 PM

Quote:

Originally posted by CJ900RR

No I dont think it was that one. But I am not shure. In Eagle's library-list it was named "Andrew custom" I think..

The files was send to a real PCB manufacturing company, a company that deliver weekly to my work, and we never have any problems with their quality. And everything else on the PCB was correct, so my guess is still that it was the library.

I can confirm, "Andrew - Custom", don't use it.
I had the same problem, PCB from manufacturing company and then a lot of work to fit the LM3886 with force because of too small holes.

ciao
andrea

Alcaid · 3rd November 2006, 07:04 PM

I made this file some time ago.

Contains:
- LM3886
- LM4780
- OPA541

Use at own risk (double check drills, pinout, pin spacing etc.) I've used them with no problems, but I do make my own PCBs.

CJ900RR · 3rd November 2006, 10:01 PM

Quote:

Originally posted by Alcaid
I made this file some time ago.

Contains:
- LM3886
- LM4780
- OPA541

Use at own risk (double check drills, pinout, pin spacing etc.) I've used them with no problems, but I do make my own PCBs.

And where is the file

Alcaid · 4th November 2006, 12:26 PM

I attached the file, but I forgot to compress it to a valid file format.

2nd November 2006, 07:24 AM	#1
Bob0513 diyAudio Member Join Date: Feb 2006 Location: home	LM3886 and LM4780 Eagle outlines Does anyone have the component outlines for the LM3886 and/or LM4780. The library on cadsoft.de that has the components is bad.

2nd November 2006, 08:23 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Search for my single sided LM4780 PCB thread. I posted the Eagle files so it has the appropriate footprint there. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

2nd November 2006, 11:58 AM	#4
diarav diyAudio Member Join Date: Dec 2004 Location: Bangalore India	If you are talking about lmopamp.lbr file, then I had no problems using the LM3886 outline on the board. Fitted perfectly. The pitch is ok. If this is the problem, perhaps you can check if your printing dimensions are coming out fine. There is a problem with the schematic however. Some pins (I think 8, 4, 5 ) dont "connect" as they were not aligned with the grid. I manually edited the schematic for LM3886 and fixed this. __________________ Regards, Din

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
lm4780 eagle library	djronbxs	Chip Amps	1	21st September 2007 03:14 PM
LM4780 SMD PCB - Eagle Files...are multilayer...	DJ Exprice	Chip Amps	10	6th December 2006 03:12 AM
eagle layout for lm4780	ELiTeHaYDeN	Chip Amps	10	27th July 2006 04:45 AM
LM3886 Eagle file	Adam M.	Chip Amps	3	15th August 2004 02:16 AM
LM4780 .lbr file for Eagle	Alcaid	Parts	2	26th March 2004 06:22 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd November 2006, 10:36 AM	#3
CJ900RR diyAudio Member Join Date: Jan 2006	If you find some eagle lbr for the 3886/3875 made by a Andrew or something simulare, dont remember exactly, do NOT use it. It has the wrong hole-size AND wrong pitch (disstance between the legs). I used it for my boards and had to drill and mixture alot to fit my LM3875 in to it.

3rd November 2006, 07:04 PM	#7
Alcaid diyAudio Member Join Date: Nov 2003 Location: Klepp	I made this file some time ago. Contains: - LM3886 - LM4780 - OPA541 Use at own risk (double check drills, pinout, pin spacing etc.) I've used them with no problems, but I do make my own PCBs.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read