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 
go to the radio page Live at electro-music.com radio 1 Please visit the chat
poster
 Forum index » DIY Hardware and Software » fonik's place
5-channel Attenuverting Mixer 2nd run
Post new topic   Reply to topic Moderators: fonik
Page 9 of 9 [214 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, 3, ..., 7, 8, 9
Author Message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Sat Aug 28, 2010 10:41 am    Post subject: Reply with quote  Mark this post and the followings unread

LektroiD wrote:
Does this mean you're no longer making this module (or others) available for DIY?

Laughing no!
since the publishing of the prebuilt module i did the VCPS-8 PCB, and i am currently working on the CV ringmod PCB Wink
i just wanted to try out offering a professional built complete module. it worked out well and i will offer more, i believe. however, DIY rules!

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
sonicwarrior



Joined: Dec 22, 2005
Posts: 266
Location: Cologne, Germany

PostPosted: Thu Oct 21, 2010 1:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
the board is not changing. i just replace R30 by a Z-diode. oh, and i incorporated the missing 100k resistor to GND for the AC mode - but i didn't change anything to the actual boards layout or part numbers.


What about updating the rev2 documentation to include the Z-diode as an option?

Are the 10nF ceramics critical or is it safe to use e.g. 22nF or 47nF instead?
I have currently no 10nF lying around but I want to finish soldering my boards.
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Thu Oct 21, 2010 1:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

sonicwarrior wrote:
Are the 10nF ceramics critical or is it safe to use e.g. 22nF or 47nF instead?
I have currently no 10nF lying around but I want to finish soldering my boards.

IMHO it is not that critical. it is for filtering noise, and taking the tolrances into account i would say it is oky to use a 22uF.

anyways, i think i need much more knowledge about all this filtering and decoupling stuff - wouldn't this be a great issue for an thread in the main DIY forum?

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
sonicwarrior



Joined: Dec 22, 2005
Posts: 266
Location: Cologne, Germany

PostPosted: Thu Oct 21, 2010 2:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Then I'm curious why you chose 10 nF caps instead of the usual 100 nF.
Back to top
View user's profile Send private message
mark_olson



Joined: Oct 26, 2006
Posts: 177
Location: Lawrence, Kansas

PostPosted: Thu Oct 21, 2010 2:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
...i need much more knowledge about all this filtering and decoupling stuff - wouldn't this be a great issue for an thread in the main DIY forum?


Indeed it would! Just two nights ago I was breadboarding a circuit and found myself wishing I understood decoupling better. Confused

Mark
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Thu Oct 21, 2010 3:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

sonicwarrior wrote:
Then I'm curious why you chose 10 nF caps instead of the usual 100 nF.

because i had them ;-P

(you will find both versions in various of designs around here)

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
sonicwarrior



Joined: Dec 22, 2005
Posts: 266
Location: Cologne, Germany

PostPosted: Thu Nov 04, 2010 1:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

Regarding the Zener:

The direction is towards R29 (black line)?
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Thu Nov 04, 2010 3:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

sonicwarrior wrote:
Regarding the Zener:

The direction is towards R29 (black line)?


yes. replace R29 by a 1k, and replace R30 by a Zener from GND to R29
(GND -->|-- R29). this will clamp the 15V down to the Zener value.

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
sonicwarrior



Joined: Dec 22, 2005
Posts: 266
Location: Cologne, Germany

PostPosted: Sat Nov 06, 2010 8:22 am    Post subject: Reply with quote  Mark this post and the followings unread

Ok, thanks. Smile
Back to top
View user's profile Send private message
jnuaury



Joined: Feb 28, 2008
Posts: 161
Location: chicago
Audio files: 9

PostPosted: Tue Dec 07, 2010 7:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

if i dont have trimpots, what would be the best value to replace the trimpot and the 10k resistor before it? 50k?

thanks

_________________
az/gde
Flickr
YouTube
Back to top
View user's profile Send private message AIM Address
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Dec 08, 2010 12:32 am    Post subject: Reply with quote  Mark this post and the followings unread

jnuaury wrote:
if i dont have trimpots, what would be the best value to replace the trimpot and the 10k resistor before it? 50k?

no. the best value would be the actual value of the potentiometer. so match the resistor to the pot (potentiometers have quite a huge tolerance...

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
RSFC



Joined: Sep 02, 2010
Posts: 63
Location: space lab

PostPosted: Sat Feb 05, 2011 7:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

Am I right to think I could use a 3PDT as opposed to a 3PST just wired differently? PST's are f*ing expensive from mouser while PDTs aren't too bad...
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Sun Feb 06, 2011 6:18 am    Post subject: Reply with quote  Mark this post and the followings unread

you are correct.
_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
tazer



Joined: Oct 18, 2010
Posts: 49
Location: UK

PostPosted: Thu Apr 14, 2011 10:56 am    Post subject: attenuverting mixer pcb Reply with quote  Mark this post and the followings unread

please please please can you do a small run of these when you do the 4046 vco pcb run-i would so appreciate that i have been trying to track this pcb down to no avail-I'm sure others would be interested also, my modular isn't complete without it Wink

I would certainly take a few pcb's of this mixer, see what you can do...............

many thanks

Ian
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: fonik
Page 9 of 9 [214 Posts]
View unread posts
View new posts in the last week
Goto page: Previous 1, 2, 3, ..., 7, 8, 9
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » fonik's place
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