my 3886IGC pcb

[digi01]

Revised repeatedly,optimization...I finished this PCB project at last.Thanks for 1audio, carlmart, jcarr very much.please look at the primitive scratch for more detail





I have set up some 'leap' points on pcb, it is joined that it is convenient to expand.bridge or parallel is easy.


yours
-digi

[digi01]

MUSE and ELNA-bp caps,HOLCO and DALE resistors.

[thomas997]

Looks good.

Now send me some for free

[otaku]

Looks very nice!! Can I buy some?

[digi01]

something in the PM

for more infor pls mail to vcgft@yahoo.com.cn

[carlmart]

Originally posted by digi01
Revised repeatedly,optimization...I finished this PCB project at last.Thanks for 1audio, carlmart, jcarr very much.
I have set up some 'leap' points on pcb, it is joined that it is convenient to expand.bridge or parallel is easy.

The pcb looks very, very good. Just three things, some mentioned on one previous mail of mine:

1) The tracks to +V and -V should be wider. If the pins are N/C, as the data specifies, you can use that area to make the track wider, on the top or bottom.

2) Provide some area on the bottom to use an SMD output resistor, like the Dale type that Rowland uses.

3) You should bypass the mute pin to ground, like the datasheet specifies. I didn't use it on my first prototype, but it's provided on my revised pcb.

The rest is very good. Congratulations! Is it possible to get some, paying of course?


Carlos

[digi01]

carlmart,thanks for you helpful suggestions again
Pins of LM3886 arranges very inconvenient,when you lay out with fat tracks,those NC pins is really a hellits mute pin and gorund pin let the things become complicated too.

btw,please check you mail

digi

[troystg]

Hi digi-

"for more infor pls mail to vcgft@yahoo.com.cn"

Is this contact handling a "group buy" or outright sales of these boards?

And the boards look great. Only request I have is for a separate mounting hole on the supply capacitor side to suport that end of the board.

Also, are these boards available with the regulartor boards on this post?

REGULATOR PSU protel layout share


Thanks Troy

[carlmart]

Originally posted by digi01
carlmart,thanks for you helpful suggestions again
Pins of LM3886 arranges very inconvenient,when you lay out with fat tracks,those NC pins is really a hellits mute pin and gorund pin let the things become complicated too.

Digi01,


We can't get away from some complications when they should be dealt with. The bypass capacitor on the mute pin should be there. Find a way to lay a track on the side, need not be wide, and bypass it to a ground, any ground.

Recently I read on this forum that N/C pins are really so: they are not connected.

If that is so then you can put a pad, solder the N/C pin to it and still put a track or fill over that same area. When I designed my pcb I simply snipped the N/C pins away and used their area for more copper surface.

The -V and +V tracks should definitely be wider, and it shouldn't be hard to do it. I did a single sided pcb for all this, with no wire bypasses, and everything went fine.


Carlos

[digi01]

Hi Troy,I will start another thread for group buy soon.Now, just share with you my DIY precious..hehe...
the regulated psu lay out projects is sitll in progress.the board cooperates with my 3886IGC.

Recently I read on this forum that N/C pins are really so: they are not connected.

Carlos,it is really?Soooooo pretty tidings I will test it.