audio spectrum analyzer - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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
Thread Tools Search this Thread
Old 14th October 2002, 05:53 PM   #1
diyAudio Member
Join Date: Oct 2002
Location: Montego Bay, Jamaica
Unhappy audio spectrum analyzer

Where can I find schematics for an audio spectrum analyzer? Help!!!!
  Reply With Quote
Old 14th October 2002, 06:25 PM   #2
tiroth is offline tiroth  United States
diyAudio Member
Join Date: Dec 2001
Location: Pittsburgh, PA, USA
A from-scratch spectrum analyzer would be astoundingly complex. There are computer programs that use a soundcard (e.g. AudioTester) or digitizing scope (bitscope) to do spectrum analysis.
  Reply With Quote
Old 14th October 2002, 06:46 PM   #3
diyAudio Member
Join Date: Oct 2002
Location: Montego Bay, Jamaica
The type I am thinking about is of a more simple nature, more for visualisation than measurement. The type generally found in graphic equalisers that just give a graphic display of the frequency levels.
  Reply With Quote
Old 14th October 2002, 06:52 PM   #4
diyAudio Member
Join Date: Sep 2001
Location: Finland, Ostrobothnia
The Elektor Electronics Magazine has made one. Schematics are available in the book 101 test instruments. I don't know if it is for sale anymore. Look in a library
This is a completely analogue circuit. Lot of work to make because of the lot of filters.

Maybe if you know someone that bought the Welleman spectrum analyzer kit, and talk nicely to him, you can get the schematics
  Reply With Quote
Old 14th October 2002, 07:39 PM   #5
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default It doesn't have to be complex

Zetex make a chip (this was discussed in Electronics World last year) called the ZFX36L01 -- it has a mixer in it and you can configure the chip for bandpass or notch. All you need to do is make a sweep generator for the local oscillator. Will it make a lab instrument -- no way -- but it can greatly simplify construction.

Or you can get a HP 3581 analyzer for less than $100 -- and this is a great bargain. Last one traded on Ebay for $72. See the manual I put on the web at
  Reply With Quote
Old 5th March 2006, 06:00 PM   #6
diyAudio Member
Join Date: Jul 2004
Location: Romania
That circuit is not also specified somewhere in Elektor Magazines?

I can't find the book 101 from elektor.

  Reply With Quote
Old 6th March 2006, 12:06 AM   #7
oPossum is offline oPossum  United States
diyAudio Member
oPossum's Avatar
Join Date: May 2005
Location: Michigan
Here is a simple 10 band LED analyzer for a "light show".

Low res (603k PNG) Hi Res (4.9M TIFF)
Possum - the other white meat
  Reply With Quote


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
Spectrum Analyzer Overd0se Parts 3 3rd June 2011 04:27 PM
thoughts on this Spectrum Analyzer ?? redrabbit Equipment & Tools 0 21st November 2007 01:52 PM
Suggestions for used spectrum analyzer? ezkcdude Digital Source 4 21st June 2007 09:24 PM
spectrum analyzer IFR1200S resident Swap Meet 2 12th December 2006 08:07 PM
Possible Spectrum Analyzer Project? Xlrator Digital Source 7 25th April 2006 05:30 AM

New To Site? Need Help?

All times are GMT. The time now is 12:09 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2