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-   -   Need schematics and board files for parellel lm3886 (http://www.diyaudio.com/forums/chip-amps/99329-need-schematics-board-files-parellel-lm3886.html)

clipto333 2nd April 2007 03:27 PM

Need schematics and board files for parellel lm3886
 
2 Attachment(s)
hi,

I need the schematic and board files for parellel lm3886tfs. i tried making a schematic in eagle but its really difficult for me. This is my first project. im going to etch the pcb myself as i cant get it made here in my city.

im going t make a single sided pcb. if anyone can help making a board design in eagle that will be excellent. ill post the pic of the schematic taken from http://www.shine7.com/audio/pa100.htm.

http://img260.imageshack.us/img260/9...aticbr5.th.gif

need board design for the psu also.

http://img206.imageshack.us/img206/6...pplyck6.th.gif

and

http://img206.imageshack.us/img206/7642/regpsim1.th.gif

aso suggest which ps is better.

please guys help me.

cheers

clipto

abid_rehan 3rd April 2007 04:38 AM

2 Attachment(s)
You can use following layout for monoblock and with slight modification you could parallel it. I made it for a friend, since I am not a big fan of 3886 there I never did a parallel or bridge for it otherwise its justa a matter of modifying the layouts for parallel or bridge. As for PSU I dont think you need a regulated PSU for gainclone.
LT 1083/4/5 has regulation volatages from 3.3 to 12 v which does not fullfill power requirements for 3886, and for LM317 you would need a transistor stage to improve output current of 317.
Normally a regulated supply is not used for gainclones.

abid_rehan 3rd April 2007 04:55 AM

2 Attachment(s)
schematics are as follows:

Fenris 3rd April 2007 03:43 PM

Do you prefer SMT or through hole components? I have a single sided SMT design for an inverted LM3886 that will work with bridge or parallel. The only through hole components are a DC offset adjusting resistor and the larger capacitors.

clipto333 5th April 2007 12:08 PM

Quote:

Originally posted by Fenris
Do you prefer SMT or through hole components? I have a single sided SMT design for an inverted LM3886 that will work with bridge or parallel. The only through hole components are a DC offset adjusting resistor and the larger capacitors.

hi,

please send the files of your inverted lm3886.

can you explain what to use in library fo resistors caps etc. i dnt know how build a board design with exact dimensions of resistors caps etc.

also if anyone has the files for eagle or any other software of pa100 amp can you post it here? i need software files.

please help

thanks

clip

Fenris 5th April 2007 04:31 PM

I'll post it tonight when I get home. I don't use Eagle, I use FreePCB. I can export to Gerber though.


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