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-   -   Whose layout is this? (http://www.diyaudio.com/forums/chip-amps/134742-whose-layout.html)

Ulew 12th December 2008 04:02 PM

Whose layout is this?
 
2 Attachment(s)
Hi!
A while ago I found this layout here, but now I don't know where!

Who have done it and does it work?

ratza 12th December 2008 04:43 PM

It's mine, it works from last year until now. If you need any other information, I will be happy to answer.

lineup 12th December 2008 05:39 PM

Is that PCB layout a bottom view?

ratza 12th December 2008 07:14 PM

Actually this is the view from EAGLE. The files were posted already here:
http://www.diyaudio.com/forums/showt...26#post1570826

Ulew 12th December 2008 08:32 PM

Quote:

Originally posted by ratza
It's mine, it works from last year until now. If you need any other information, I will be happy to answer.
Super!
Actually, I've already used your design to make a board, but I haven't put it together beacause I don't know if i it works, but now I know, so I'll carry on with it!

But what does the power resistor do? I haven't seen it on other boards, I think!

And one question about the LM3886T, non-isolated, can I put it on the heatsink without isolation as long as the heatsink isn't connected to something, or do I short it if I do so?

lineup 12th December 2008 08:34 PM

It is a 'mirrored view'.
So my guess was right. The PCB posted above should be a view as seen from the bottom side of the PCB.
Where the tracks are, but not the components.

Greg Erskine 12th December 2008 10:02 PM

Quote:

Originally posted by lineup
It is a 'mirrored view'.
So my guess was right. The PCB posted above should be a view as seen from the bottom side of the PCB.
Where the tracks are, but not the components.

Hi lineup,

Not mirrored, it is a view looking from above.

regards

Nico Ras 13th December 2008 04:49 PM

Quote:

Originally posted by Greg Erskine


Hi lineup,

Not mirrored, it is a view looking from above.

regards

I think you should do a mirrored print for those who do not understand and use an iron and laser print.

ratza 14th December 2008 02:30 PM

Quote:

Originally posted by Ulew

But what does the power resistor do? I haven't seen it on other boards, I think!

And one question about the LM3886T, non-isolated, can I put it on the heatsink without isolation as long as the heatsink isn't connected to something, or do I short it if I do so?


That resistor is a 10ohm/3W which has 10 turns of 1mm copper wire. My boards are using the non insulated but my case is made out of wood. If the heatsink doesn't touch any other connected metallic part, it's fine.

For those who use press'n'peel: don't print the view in mirror, print it exactly how it's in EAGLE. Leave only pads, bottom and dimension in view then at print options choose "Solid" and "Black"

Ulew 14th December 2008 02:33 PM

Quote:

Originally posted by ratza



That resistor is a 10ohm/3W which has 10 turns of 1mm copper wire. My boards are using the non insulated but my case is made out of wood. If the heatsink doesn't touch any other connected metallic part, it's fine.

Okay!
Then I'm good to go! Hopefully the amps are done pretty soon and then I'll show them here!


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