Both Secondaries for Positive Voltage? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 21st May 2004, 03:37 PM   #1
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
Default Both Secondaries for Positive Voltage?

Given a transformer with a center tapped secondary...

Could you take both secondaries and make them give you positive voltage using 3-pin regulators? That is to say, use the "top" secondary as normal, and then use the "bottom" with the center tap as positive, and use a regulator to get a second set of +V out of it?

general idea drawing (sorry about the quality)

/edit: Probably couldn't use them for circuits that were connected at all, but for independent devices...
Attached Images
File Type: gif regs.gif (2.8 KB, 101 views)
__________________
Jesus loves you.
  Reply With Quote
Old 27th May 2004, 12:29 AM   #2
diyAudio Member
 
Join Date: Dec 2003
Location: Orange County, CA
Default Yes

Yes you can but you forgot the rectifiers and filter capacitors.
__________________
Dan Fraser
  Reply With Quote
Old 27th May 2004, 02:43 AM   #3
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
You don't have to have separate grounds for the positive supplies. You can use two full-wave centre-tap rectifiers (two diodes each) to get two positive supplies, then run it to your two regulators.
http://sound.westhost.com/power-supplies.htm#fullwave
Or if ripple isn't a problem, you could use two half-wave rectifiers, one diode each.
  Reply With Quote
Old 27th May 2004, 11:37 AM   #4
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
Default Re: Yes

Quote:
Originally posted by dmfraser
Yes you can but you forgot the rectifiers and filter capacitors.
those are my magic regulators with infinite PSRR.

that's why the drawing is called a general idea drawing.

I had completely forgot about the ESP page (seen it before) thanks.
__________________
Jesus loves you.
  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
One transformer with 4 secondaries or two transformers with dual secondaries Baka Chip Amps 5 28th November 2008 06:39 AM
Positive regulator to produce negative voltage? stef1777 Parts 45 8th February 2008 07:46 AM
LTP w/ positive only supply arnoldc Tubes / Valves 10 24th May 2007 02:32 PM
Small voltage deviation at positive and negative rail 2Bak Chip Amps 1 14th December 2003 06:42 PM


New To Site? Need Help?

All times are GMT. The time now is 02:29 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