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 » Lunettas - circuits inspired by Stanley Lunetta
Christmas Lunetta!
Post new topic   Reply to topic Moderators: mosc
Page 2 of 2 [30 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Goto page: Previous 1, 2
Author Message
Spacebones



Joined: Jul 12, 2011
Posts: 15
Location: Utah
Audio files: 2

PostPosted: Fri Dec 30, 2011 2:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Awesome! Thanks so much!
Back to top
View user's profile Send private message
JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
Audio files: 14

PostPosted: Fri Dec 30, 2011 5:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Psyingo wrote:
Spacebones wrote:
tjookum, I'm having a hell of a time finding that 4069 Triwave oscillator... Would you happen to have a schematic or a link?


here it is: http://home1.gte.net/res0658s/fatman/4069_lfo.html

trying to make a triangle wave osc? You can use a regular schmitt lunetta oscillator and a voltage follower connected to the capacitor Smile

Additionally, having just read the linked page, seems like they could do with a lower value cap for lower frequencies instead of adding that huge resistance, but both ways work, in my experience lower value caps are easier to find (read: scavenge) than 22 meg resistors Wink
Back to top
View user's profile Send private message
Kabzoer



Joined: Feb 07, 2011
Posts: 82
Location: Belgium

PostPosted: Sun Jan 08, 2012 9:53 am    Post subject: Reply with quote  Mark this post and the followings unread

tjookum wrote:
about xor noise, try this schematic. It's one of my all time favorites.

I tried that schematic, works well, I used all 4 outputs and they give different noise, now I got it in a module, but it seems that the outputs of the first XOR and the last one are the same... Did I do something wrong or is this always like that?

_________________
http://soundcloud.com/contraspect
Back to top
View user's profile Send private message Visit poster's website
Kabzoer



Joined: Feb 07, 2011
Posts: 82
Location: Belgium

PostPosted: Sun Jan 08, 2012 11:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Maybe that wasn't very clear, here's a schematic, so output 1 and 4 are the same,
which is weird, because 1, 2 and 3 give me different noise...

(I did omit the buffers but I don't think that makes a difference)


xorchainwithbufferedoscillators_141.png
 Description:
 Filesize:  60.68 KB
 Viewed:  11806 Time(s)

xorchainwithbufferedoscillators_141.png



_________________
http://soundcloud.com/contraspect
Back to top
View user's profile Send private message Visit poster's website
JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
Audio files: 14

PostPosted: Sun Jan 08, 2012 3:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

Did you check them with an oscilloscope? They may have been phase inverted.

I was suspicious of thst circuit from the moment I saw it and your query has made me more certain that it could be done with 2 XOR gates, try just the middle two gates, each osc to one input of the XORs, wait, you might only need three.
Whatever the case, it seems to me like it's doing something unecessary, like you'd get the same result from fewer gates or a simpler circuit.

_________________
As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"


Green Dungeon Alchemist Laboratories
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: mosc
Page 2 of 2 [30 Posts]
View unread posts
View new posts in the last week
Goto page: Previous 1, 2
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
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