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-   -   My tiny single sided LM3886 PCB layout. :) (http://www.diyaudio.com/forums/chip-amps/60642-my-tiny-single-sided-lm3886-pcb-layout.html)

Russ White 12th July 2005 04:21 PM

My tiny single sided LM3886 PCB layout. :)
 
Please have a look at this and tell me what you think.

It is designed to utilize Carlos' Snubberized PS.

Cheers!
http://www.sequenet.com/images/LM3886M1_1.png
http://www.sequenet.com/images/LM3886M1_2.png

Russ White 12th July 2005 08:31 PM

Well I guess there is nothing seriously wrong with it or someone would have piped up by now. :)

tobias_svensk 12th July 2005 08:49 PM

Helu Russ, do you have Eagle in your "Autostart"? ;)

I'm sure it will work, and I'm also sure that you already have etch it? :)

On my board (wich is a 99% BrianGT copy, so thanks/sorry Brian :)) I added snubberz before the big cap.
http://www.ettnet.se/~tobias/diy/lm3886/3886.png
Another (big)
http://www.ettnet.se/~tobias/diy/lm3...3886opabuf.png

Keep spitting 'em out... :cool:

Russ White 12th July 2005 09:08 PM

Quote:

Originally posted by tobias_svensk
Helu Russ, do you have Eagle in your "Autostart"? ;)

Ah autostart now there an idea! :D

Nice work Tobias!

Thanks for the reassurance. :up:

asgorath 12th July 2005 10:31 PM

could you please post the eagle files?

Russ White 13th July 2005 02:09 PM

Quote:

Originally posted by asgorath
could you please post the eagle files?

I will let this think loose into the wild only after I have tested it. :)

Russ White 13th July 2005 02:11 PM

Update
 
OK, I tweaked the layout a little and etched the boards. I will build the amp tonight. Here is the latest layout:

http://www.sequenet.com/images/LM3886M1_3.png

richie00boy 13th July 2005 02:20 PM

Nice, but no zobel option? ;)

Russ White 13th July 2005 02:23 PM

Quote:

Originally posted by richie00boy
Nice, but no zobel option? ;)

I have thought about adding that. But, my speakers already have zobels in them, so I figured why have two zobels in the output?

richie00boy 13th July 2005 03:12 PM

The zobel in the speakers is a different zobel to the one on the amp output.


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