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 » YuSynth
Power supply decoupling?
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [6 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
gdavis



Joined: Feb 27, 2013
Posts: 359
Location: San Diego
Audio files: 1

PostPosted: Mon Apr 29, 2013 11:31 am    Post subject: Power supply decoupling?
Subject description: Decoupling multiple modules on a single PCB
Reply with quote  Mark this post and the followings unread

Each of the YuSynth modules have electrolytic decoupling caps on the power supply input, I get this. However, I want to combine several modules on to one board and can't quite wrap my head around how I should handle the power supply decoupling.

Would it be appropriate to just have one set of decoupling caps at the power input to the board, or should I still maintain the individual power decoupling for each module?

_________________
My synth build blog: http://gndsynth.blogspot.com/
Back to top
View user's profile Send private message
Uncle Krunkus
Moderator


Joined: Jul 11, 2005
Posts: 4761
Location: Sydney, Australia
Audio files: 52
G2 patch files: 1

PostPosted: Wed May 01, 2013 6:17 am    Post subject: Reply with quote  Mark this post and the followings unread

Keep it separately for each module on the module's board. These are like little reservoirs of power for each module, if you combine them, or re-locate them, the contamination of one module's earth from the others only goes up, not a good thing. Smile
_________________
What makes a space ours, is what we put there, and what we do there.
Back to top
View user's profile Send private message Visit poster's website
gdavis



Joined: Feb 27, 2013
Posts: 359
Location: San Diego
Audio files: 1

PostPosted: Fri May 03, 2013 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks, that's exactly what I was thinking as well, but wasn't sure if that was really an issue or if the decoupling was there just to deal with connector resistance.

Which then leads me to the question if I have the PS decoupling at each module, do I need additional decoupling at the boards PS connector or should I just go straight from the board connector to each modules PS branch?

_________________
My synth build blog: http://gndsynth.blogspot.com/
Back to top
View user's profile Send private message
Uncle Krunkus
Moderator


Joined: Jul 11, 2005
Posts: 4761
Location: Sydney, Australia
Audio files: 52
G2 patch files: 1

PostPosted: Sun May 05, 2013 5:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm not really sure what you're asking.
Each module has it's own decoupling caps on the board yeah?
End of story. I think,.....
But maybe I'm not seeing it the way you are.

_________________
What makes a space ours, is what we put there, and what we do there.
Back to top
View user's profile Send private message Visit poster's website
gdavis



Joined: Feb 27, 2013
Posts: 359
Location: San Diego
Audio files: 1

PostPosted: Tue May 07, 2013 6:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

See the two attachments. Wondering if the 2 caps at the power connector in blaha are necessary or is blahb the way to go?

Though at this point I think I'm going to put a 7XL15 pair on each board which makes the question moot.


blaha.png
 Description:
 Filesize:  2.75 KB
 Viewed:  5010 Time(s)

blaha.png



blahb.png
 Description:
 Filesize:  2.48 KB
 Viewed:  5010 Time(s)

blahb.png



_________________
My synth build blog: http://gndsynth.blogspot.com/
Back to top
View user's profile Send private message
Uncle Krunkus
Moderator


Joined: Jul 11, 2005
Posts: 4761
Location: Sydney, Australia
Audio files: 52
G2 patch files: 1

PostPosted: Wed May 08, 2013 1:04 am    Post subject: Reply with quote  Mark this post and the followings unread

Yeah, go with blahb.
Look at it like a lowpass filter. (ie, the series resistance of the wires comes first, then you hit the caps, which are right next to, (preferably on) the module boards)

_________________
What makes a space ours, is what we put there, and what we do there.
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: Scott Stites
Page 1 of 1 [6 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 » YuSynth
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