OMG it's the 8038 again!! - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

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 2nd November 2009, 08:59 AM   #1
diyAudio Member
 
Rob11966's Avatar
 
Join Date: Jun 2007
Location: Australia
Default OMG it's the 8038 again!!

Hi again folks,

The 8038 returns but this time I have 2 promises -

1. This is the last question about the 8038 function generator (see thread with schematic below) and

2. It's a simple one this time

After significant help from the forum my 8038 based function generator works very well. Not being satisfied with this I have added a simple LED frequency counter which I bought off ebay for $18. It's actually not a bad little unit and when powered with an external AC supply (+ simple regulator circuit) it works brilliantly. However, when I tap off the same secondary that I used for the function generator the counter reports incorrect frequencies and it also interferes with the generated waves.

Obviously the simple solution is to drop in a separate transformer and run the counter off this. I can do this but I am looking for a more elegant solution.

Here is the question - Is there a simple way to 'share' the existing secondary winding without cross interference between the function generator and the frequency counter? If there is a simple solution let me know, if not I will just resort to the separate transformer solution.

Cheers,

Rob
  Reply With Quote
Old 14th November 2009, 04:12 PM   #2
diyAudio Member
 
Join Date: Nov 2009
No way to share it , and no cheap way to do it , use a second pwr supply .
Get and advice , shield the freq counter and it's pwr supply very well , optimally use a closed metal box with ceramic passtrough ( look to HAM radio construction ) , without shielding digital noise is for sure getting into the 8038 .
Have fun , the 8038 is a funny little beast i'm using it since it's born and i'm going to use some of the leftover since those days again now...
bye bye
Sapo
  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 8038 Function Generator Problem Rob11966 Equipment & Tools 25 18th December 2009 09:03 AM


New To Site? Need Help?

All times are GMT. The time now is 12:03 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