electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software
Triangle out of cd40106
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
Page 1 of 1 [14 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Tue Jan 19, 2010 3:13 pm    Post subject: Triangle out of cd40106 Reply with quote  Mark this post and the followings unread

Hey i tried to get a trianglewave out of the cd40106, i built it like this on my breadboard: http://www.elecfree.com/electronic/wp-content/uploads/2009/09/triangle-and-squarewave-generator-by-ic-40106.jpg

The output signal is very low, I tried to amplifie it with a tl072. Now it`s loud enough, but this is a very complicated way. And the signal is not so clean, it is something between a triangle and a squarewave!

What is the easiest way to get a strong and clean triangle out of a 40106???

Last edited by kaputtpanzer on Tue Jan 19, 2010 6:11 pm; edited 1 time in total
Back to top
View user's profile Send private message Visit poster's website
frijitz



Joined: May 04, 2007
Posts: 1734
Location: NM USA
Audio files: 54

PostPosted: Tue Jan 19, 2010 5:36 pm    Post subject: Re: Triangle out of cd40106 Reply with quote  Mark this post and the followings unread

Error 404 - Not Found
Sorry highly. Page you want to see. Changes.
Please find the new.
Back to top
View user's profile Send private message
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Tue Jan 19, 2010 6:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh sorry now the link works!
Back to top
View user's profile Send private message Visit poster's website
synthmonger



Joined: Nov 16, 2006
Posts: 578
Location: flada
Audio files: 3

PostPosted: Wed Jan 20, 2010 3:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

This works great:
http://www.cgs.synth.net/modules/cgs21_super_psycho.html

_________________
Youtube!
modular demos!
Whacky tunes!
Back to top
View user's profile Send private message Visit poster's website
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Wed Jan 20, 2010 4:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ahh ok thank you. But I don`t want to use bipolar power supply.
Back to top
View user's profile Send private message Visit poster's website
synthmonger



Joined: Nov 16, 2006
Posts: 578
Location: flada
Audio files: 3

PostPosted: Wed Jan 20, 2010 6:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Use a virtual ground then. Wiki or google it for all the info you need on it if you don't know what it is.
_________________
Youtube!
modular demos!
Whacky tunes!
Back to top
View user's profile Send private message Visit poster's website
ezekiel



Joined: Oct 17, 2009
Posts: 30
Location: Columbus Ohio

PostPosted: Fri Jan 22, 2010 7:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Or use an LM324 for single-sided supply.

The triangle wave pulled from the CMOS inverter oscillator is going to be coming out both weak and out-of-shape. The op amp is needed as a buffer and possibly an amplifier before feeding that triangle into the subsequent circuit.

I guess what you are saying is that if you need an op amp, you may as well not use the 40106 and just use a dual or quad op amp for an official, sharp triangle oscillator.
Back to top
View user's profile Send private message
synthmonger



Joined: Nov 16, 2006
Posts: 578
Location: flada
Audio files: 3

PostPosted: Fri Jan 22, 2010 7:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

The Buffer and amplifier help correct it's symmetry and amplitude. Granted, it's not a perfect triangle but it's pretty close. Of course it would be easier to just look up a dual op-amp LFO schematic. Less parts too.
_________________
Youtube!
modular demos!
Whacky tunes!
Back to top
View user's profile Send private message Visit poster's website
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Thu Jan 28, 2010 10:34 am    Post subject: Reply with quote  Mark this post and the followings unread

hmmm ok.
maybe this will work without bipolar power supply???

http://www.elecfree.com/electronic/wp-content/uploads/2007/07/ckt17_1.gif
Back to top
View user's profile Send private message Visit poster's website
ezekiel



Joined: Oct 17, 2009
Posts: 30
Location: Columbus Ohio

PostPosted: Sat Jan 30, 2010 1:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
maybe this will work without bipolar power supply???


Well, I just tried it with LM324 and 9V/0V supply and got an oscillation but too low level to confirm its waveshape on my lowtech mixer/PC.

Then, I attached the two ground points to 4.5V. Output was stronger, but still quite low level, but now clearly ramp/sawtooth.

I put a 300k pot in place of the 120k resistor and got a roughly 50 Hz to 200 Hz range. I think this circuit needs some beefing up for usefulness in synths.
Back to top
View user's profile Send private message
hexagon5un



Joined: Apr 10, 2009
Posts: 38
Location: Munich, Germany
Audio files: 1

PostPosted: Wed Feb 03, 2010 10:18 am    Post subject: Reply with quote  Mark this post and the followings unread

The triangle wave out of a 40106 or similar oscillator ends up bouncing back and forth between 1/3 VCC and 2/3 VCC, so yeah the signal needs about 3x gain to swing full-range. If you're going into a dual-supply op-amp that shares ground with your 40106, you'll want to pass it through a capacitor to pull off the 1/2 VCC offset.

One quick-and-dirty trick is to use an unbuffered inverter (4069UB for 9v, 74hc04U for 5v -- the "U" is crucial) as an amplifier -- it ends up giving just about the right amplification with a little clipping distortion that I kinda like. It ends up like a sine-waveshaped triangle. You still end up with a positive (single-supply) signal, but it's rail to rail.

Try that out if you've got the parts around.
Back to top
View user's profile Send private message
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Fri Feb 05, 2010 9:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey thanks i think i order some 4069s and try it. if i get a good result i think i will draw a basic schematic, just for newbies like me.
Back to top
View user's profile Send private message Visit poster's website
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Tue Feb 16, 2010 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

http://www.talkingelectronics.com.au/ChipDataEbook-1d/html/images/4069-fig2a.gif

Is this a good way to amplify the signal?
Back to top
View user's profile Send private message Visit poster's website
kaputtpanzer



Joined: Nov 02, 2009
Posts: 139
Location: Cologne
Audio files: 15

PostPosted: Mon Mar 01, 2010 4:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

hexagon5un wrote:
The triangle wave out of a 40106 or similar oscillator ends up bouncing back and forth between 1/3 VCC and 2/3 VCC, so yeah the signal needs about 3x gain to swing full-range. If you're going into a dual-supply op-amp that shares ground with your 40106, you'll want to pass it through a capacitor to pull off the 1/2 VCC offset.

One quick-and-dirty trick is to use an unbuffered inverter (4069UB for 9v, 74hc04U for 5v -- the "U" is crucial) as an amplifier -- it ends up giving just about the right amplification with a little clipping distortion that I kinda like. It ends up like a sine-waveshaped triangle. You still end up with a positive (single-supply) signal, but it's rail to rail.

Try that out if you've got the parts around.


I've tried it, but i don't get a good result. when I amplifie the signal with the 4069ube the output is a squarewave. do you have a schematic?
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
Page 1 of 1 [14 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use