electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
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 
Live streaming at radio.electro-music.com

  host / artist show at your time
  PHOBoS music from project "droning" by Louigi Verona
Please visit the chat
 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
noise oscillator
Post new topic   Reply to topic Moderators: mosc
Page 1 of 1 [9 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
fetideye



Joined: Jun 22, 2015
Posts: 6
Location: Netherlands

PostPosted: Sat Oct 10, 2015 2:49 am    Post subject: noise oscillator
Subject description: noise!
Reply with quote  Mark this post and the followings unread

i've made a noise synth out of a cd4093 + cd4040

this is a picture of a dual version, fully expanded.
Posted Image, might have been reduced in size. Click Image to view fullscreen.
you can patch all the 4040 divisions together, to make sound + rythme variations.

all the info to build it (+eagle files) resides here:http://reverselandfill.org/workshops/cmos.html
it's my first pcb project Smile

i've made some updates to the pcb recently, for cv control per OSC and better noise.
here is the schematic of this new version:
ps: the diodes at the cv mod part are zeners
Posted Image, might have been reduced in size. Click Image to view fullscreen.

sounds of the (old) dual version:
https://soundcloud.com/martijn-verhallen/fetid-noise-modular
Back to top
View user's profile Send private message Visit poster's website
synaesthesia



Joined: May 27, 2014
Posts: 206
Location: Germany
Audio files: 74

PostPosted: Mon Oct 12, 2015 12:30 am    Post subject: Reply with quote  Mark this post and the followings unread

welcome fetideye! What a wonderful noise Smile

If I get the schematic right, JP1 is meant to patch some of the 4040 divisions together. I think it would be a good idea to have a resistor in series with each input so that you don't create any shorts between HIGH and LOW outputs of the 4040.
Back to top
View user's profile Send private message
fetideye



Joined: Jun 22, 2015
Posts: 6
Location: Netherlands

PostPosted: Tue Oct 13, 2015 4:51 am    Post subject: noise oscillator Reply with quote  Mark this post and the followings unread

hi synaesthesia

thanks!

by resistors in series, you mean that every input to jp1 :

----cable---resistor---jp1

while all jp1 pads are connected?

what value should i take? 1k?
Back to top
View user's profile Send private message Visit poster's website
synaesthesia



Joined: May 27, 2014
Posts: 206
Location: Germany
Audio files: 74

PostPosted: Tue Oct 13, 2015 11:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, I meant like this below. It would be even safer to add a resistor to each 4040 output instead if there is a risk that they are ever connected directly to each other.

The HEF CMOS family specification lists 10mA maximum current per input or output. At 5V that would mean 500 Ohms to limit the current to 10mA. At 10V it means 1K Ohms. Given two outputs from the 4040, one HIGH and one LOW, the total series resistance between them is twice that value. So I think that 1K is the minimum and 10K is a good choice, but others may differ and elektrouwe can tell that I am torturing my CMOS ICs a bit sometimes. Wink

Adding the resistors might have a small effect on the sound because you change the characteristic of your mixer stage a bit. However, the 4.7uF plus 100K combination already makes a strong RC high-pass filter, and so I don't expect the sound to change noticeably.


Capture.PNG
 Description:
 Filesize:  7.05 KB
 Viewed:  21 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

Capture.PNG


Back to top
View user's profile Send private message
marcelds



Joined: May 24, 2011
Posts: 19
Location: austria

PostPosted: Thu Nov 26, 2015 10:37 am    Post subject: Reply with quote  Mark this post and the followings unread

hey, this is a little late I see, but i'm going to start building this - trying to make sure i fully understand the schematic first.
from the build guide, there are these mod suggestions:

Quote:
Connect all the division outputs to patchpoints on your panel (banana?)
Use the DIV shaper inputs as patchpoint inputs


so JP1 is for the output stage, e.g. the divider outputs from the 4040 get patched up to there on the panel. each nand output on the 4093 gets its own output, as does the final output. where exactly are the DIV shaper inputs?
looks like a super interesting circuit. thanks a lot for sharing.
Back to top
View user's profile Send private message
fetideye



Joined: Jun 22, 2015
Posts: 6
Location: Netherlands

PostPosted: Thu Nov 26, 2015 11:22 am    Post subject: Reply with quote  Mark this post and the followings unread

the mod guide was intended for the older version.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

the idea is that you patch the division outputs (2, 4, 8 , 16, 32 etc) onto the div1 / div2 and div3 inputs.
note: something has to be patched in div1 to hear sound

if you make the mega version, you make output points for all divisions and inputs (div1, 2 and 3 , and it is useful to make some multiples of these)

and here is an example for cv inputs (d1 = 9.2v zener, not super essential, but handy for 12v modular connections)
Posted Image, might have been reduced in size. Click Image to view fullscreen.

ps: i have some pcb's (and full kits) left, if you are interested
Back to top
View user's profile Send private message Visit poster's website
marcelds



Joined: May 24, 2011
Posts: 19
Location: austria

PostPosted: Thu Nov 26, 2015 2:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

aha, got it! thanks a ton for the explanation, and for the new schematic. i'll let you know how it sounds for me ; )
Back to top
View user's profile Send private message
fetideye



Joined: Jun 22, 2015
Posts: 6
Location: Netherlands

PostPosted: Thu Nov 26, 2015 2:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

ps: a good patch to start with is:
/16 - div1
/4 - div2
/2 - div3

then add bigger divisions for variations.

ps2:
the potmeters are left orientated. (noise against hate)
turn left for high frequencies / noise
turn right for bleeps

i made a mod with a multiturn potmeter on pot1. works good for channeling the sweet spots.
Back to top
View user's profile Send private message Visit poster's website
marcelds



Joined: May 24, 2011
Posts: 19
Location: austria

PostPosted: Thu Nov 26, 2015 2:38 pm    Post subject:   Reply with quote  Mark this post and the followings unread

hell yeah to left-oriented noise against hate
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: mosc
Page 1 of 1 [9 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 » 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
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


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