Practical use of 431 regulator - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, 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 20th February 2004, 01:48 PM   #1
borges is offline borges  Norway
diyAudio Member
 
Join Date: Dec 2003
Location: Oslo, Norway
Default Practical use of 431 regulator

Hi,

I need two DC reference voltages adjustable between +5V and -5V. The easiest way to do this, I figure, is to use a couple of 431's and follower opamps.

The data sheets for the 431 feature wildly varying feedback resistors in the different examples. So I'm seraching for schematics with successful use of 431. It would help me if you could link to old posts with 431's in them.

I'm not limited to this reference, so if there are circuits that are more fit than the 431, I'm open to that.

The figure shows how I planned to use the regulators. There will be decoupling capacitors on the power supply pins and possibly where I tap the potentiometers. Should there be decoupling elsewhere too?

Greetings,

Břrge
  Reply With Quote
Old 20th February 2004, 01:52 PM   #2
borges is offline borges  Norway
diyAudio Member
 
Join Date: Dec 2003
Location: Oslo, Norway
Trying attach once more...
Attached Images
File Type: jpg sch.jpg (56.5 KB, 142 views)
  Reply With Quote
Old 20th February 2004, 01:59 PM   #3
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
I suggest that you choose 1 k for gain setting also. I have 1-2.2 k between ref and GND. Don't forget to consult the datasheet also. Notice that different brands are different, not exactly second source.

Consult the datasheet concerning caps for the 431. 0-10 nF or > 10 uF. It's normallay not necessary. Just ad a LP-filter between the pot and opamp input. 100 k + 0.1-1 uF or something.
__________________
/Per-Anders (my first name) or P-A as my friends call me
  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
Practical PSE thinking. Salas Tubes / Valves 10 8th December 2007 05:21 PM
practical choice for an amp jarthel Tubes / Valves 2 22nd June 2007 02:57 AM
Is this practical tenderland Tubes / Valves 10 1st April 2006 02:56 AM
is SMT practical for DIY? dorkus Solid State 13 24th April 2002 02:34 AM


New To Site? Need Help?

All times are GMT. The time now is 09:01 PM.


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