Help Needed on DIY LM 3886 based 5.1 Channel AMP for PC Home Theater - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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
Reply
 
Thread Tools Search this Thread
Old 25th September 2013, 04:03 AM   #11
diyAudio Member
 
Join Date: Sep 2013
Location: Pink City
Thanks a lot friends for your valuable suggestions.

I will not use the PSU I got, but will be making a different PSU once I get the transformers.

Will post the further updates soon.
  Reply With Quote
Old 25th September 2013, 04:50 AM   #12
Mihkus is offline Mihkus  Estonia
diyAudio Member
 
Mihkus's Avatar
 
Join Date: Jul 2012
I found SAMWHA caps being pretty good...
What i mean is the price 3$ per 22000uf... You would need 4 of them only..
But thats just for the 5 LM3886 amps.
  Reply With Quote
Old 25th September 2013, 11:31 AM   #13
diyAudio Member
 
Join Date: Sep 2013
Location: Pink City
Collected more stuff:

Wiring kit for soldering/connecting, audio input output ports, PSU components, one transformer:
20130925_165148.jpg

--------------------------

2 X 10000uf, 63V
2 X 0.1 uf, 100V
1 X 35A bridge rectifier
20130925_165038.jpg

-------------------------

24-0-24, 5A transformer to power 5X LM3886 boards:
20130925_165023.jpg
  Reply With Quote
Old 26th September 2013, 04:30 AM   #14
diyAudio Member
 
Join Date: Apr 2005
Location: India
Now for PSU follow this design... Dont forget to attach fuses (Slow blow fuses).

http://www.circuitstoday.com/wp-cont...wer-supply.jpg
  Reply With Quote
Old 26th September 2013, 05:15 AM   #15
diyAudio Member
 
Join Date: Sep 2013
Location: Pink City
Quote:
Originally Posted by rakesh_sharma23 View Post
Now for PSU follow this design... Dont forget to attach fuses (Slow blow fuses).

http://www.circuitstoday.com/wp-cont...wer-supply.jpg
Right now I don't have fuses so can I skip this state till I complete the testing and later I can add the fuses when I am finalising the product. BTW what rating/spec fuses I need?

Vendor's site suggests to connect a 60W bulb in between while fist time testing which I can use for now.

About the PSU circuit design, I am confused how to connect the 35A bridge rectifier? There are four legs on it, 3 are similar and one is different. Now all four lags it will be connected but not sure which one to connect where?
Rest is not confusing.
  Reply With Quote
Old 26th September 2013, 07:37 AM   #16
diyAudio Member
 
Join Date: Apr 2005
Location: India
May be this will help...If you are still not able to understand..

Than please wait,

First go through electronics basics ones more..Else you may result in burning or Destroying you amp project.. and can even hurt your self..
Attached Images
File Type: png 35A rectifier.png (11.3 KB, 180 views)
  Reply With Quote
Old 26th September 2013, 07:41 AM   #17
diyAudio Member
 
Join Date: Sep 2013
Location: Pink City
Quote:
Originally Posted by rakesh_sharma23 View Post
May be this will help...
Thanks, that really helped a lot.
The bridge rectifier I have is the same one like the image you posted. Now I can move forward.

Last edited by Jack Sparrow; 26th September 2013 at 07:47 AM.
  Reply With Quote
Old 26th September 2013, 07:53 AM   #18
diyAudio Member
 
Join Date: Apr 2005
Location: India
This will help you in wiring.

http://www.diyaudio.com/forums/attac...tazna-sema.jpg
  Reply With Quote
Old 26th September 2013, 08:04 AM   #19
diyAudio Member
 
Join Date: Dec 2003
Location: Randers, Denmark
some very good articles here

Power Supply for Power Amplifiers
  Reply With Quote
Old 26th September 2013, 12:05 PM   #20
diyAudio Member
 
Join Date: Sep 2013
Location: Pink City
Quote:
Originally Posted by rakesh_sharma23 View Post
Quote:
Originally Posted by Kjeldsen View Post
some very good articles here

Power Supply for Power Amplifiers
Thanks.

Most probably my another transformer for the sub (28-0-28, 5A with provision of 18-0-18, .500mA) will also be ready by tomorrow so I will again go to the market to collect it. I have collected PSU components for LM3886 part.

Now I will also need PSU for the SUB AMP and currently I have this PSU: 12-0-12VAC 1A Input, 18-0-18VAC 1A Input, 27-0-27VAC 5A Input, Regulated 12-0-12VDC 1A Output, Regulated 18-0-18VDC 1A Output, 38-0-38VDC 5A Output .

Please suggest what components I need to change in this PSU? What more parts I need to collect from the market?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Case for home theater PC (HTPC) siliconray Siliconray Online Electronics Store 5 15th May 2012 01:34 AM
3 way active speaker system + Subwoofer based on Lm 3886 & 4780 kuldeep Chip Amps 13 19th April 2012 09:33 PM
5.1 Channel Chip Amp/Gainclone for Home Theater Buddie Chip Amps 117 22nd February 2011 01:01 PM
LM 3886 PCB Based On Carlos Fm Schemetic neeraj Chip Amps 64 11th December 2010 08:24 AM
DIY Amp for my Home Theater ccarrigan Solid State 19 25th November 2002 06:58 AM


New To Site? Need Help?

All times are GMT. The time now is 04:28 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2