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 » Ken Stone designs - CGS
Psycho lfo wiring question
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [7 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
R_Gol



Joined: Oct 17, 2019
Posts: 34
Location: World

PostPosted: Fri Oct 30, 2020 7:22 am    Post subject: Psycho lfo wiring question Reply with quote  Mark this post and the followings unread

I need a clarification regarding the unused 40106 pins https://imgur.com/a/EmmwqPY

Is pin 11 & pin 14 wired to Ground, pin 7 to -vee, pin 10 wired to pin 13? pin 12 is left untouched ?
am I reading it the right way?
Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 5591
Location: Moon Base
Audio files: 705

PostPosted: Fri Oct 30, 2020 8:31 am    Post subject: Reply with quote  Mark this post and the followings unread

affirmative

IC1E and IC1F are just unused gates and with CMOS chips you should never leave inputs unconnected. The reason pin 10 is connected
to 13 is probably because it was more convenient with the layout but you could also connect pin 13 to something else.

edit: it looks like on the PCB design those gates are swapped but it works just the same.

_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
R_Gol



Joined: Oct 17, 2019
Posts: 34
Location: World

PostPosted: Fri Oct 30, 2020 9:44 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
affirmative

IC1E and IC1F are just unused gates and with CMOS chips you should never leave inputs unconnected. The reason pin 10 is connected
to 13 is probably because it was more convenient with the layout but you could also connect pin 13 to something else.

edit: it looks like on the PCB design those gates are swapped but it works just the same.

Thanks. I was mainly unsure about pin 10 & 13. You made it clear.
I have another question regarding combining the psycho lfo(https://sdiy.info/wiki/CGS_psycho_LFO) and half of the utility lfo (https://sdiy.info/wiki/CGS_utility_LFO) at the same stripboard.

While the psycho lfo get its +- 12/15 v after a 33r resistor. the utility lfo get its power after a ferrite bead.
If I would like to combine the two circuits to the same stripbard, meaning both will share the same power, can I just omit the ferrite bead at the utility lfo and provide the utility circuit with the same power as the pyscho?(after the 33r resistor) ?
Is there anything wrong with the above ?
Hope I made MY question clear

Thanks
Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 5591
Location: Moon Base
Audio files: 705

PostPosted: Fri Oct 30, 2020 12:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

You could do that but with circuits like these, which can be a bit noisy on the supply, I would add the beads or another set of resistors.
_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
R_Gol



Joined: Oct 17, 2019
Posts: 34
Location: World

PostPosted: Fri Oct 30, 2020 3:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
You could do that but with circuits like these, which can be a bit noisy on the supply, I would add the beads or another set of resistors.

by adding the beads you mean that the utility lfo will get is power like in the original - meaning after the beads and the psycho lfo will get is power after the resistor, also as in the original ?
Back to top
View user's profile Send private message
PHOBoS



Joined: Jan 14, 2010
Posts: 5591
Location: Moon Base
Audio files: 705

PostPosted: Fri Oct 30, 2020 6:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

yes, this will add some isolation between them reducing the chance of crosstalk.
_________________
"My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger MSN Messenger
R_Gol



Joined: Oct 17, 2019
Posts: 34
Location: World

PostPosted: Sat Oct 31, 2020 12:21 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
yes, this will add some isolation between them reducing the chance of crosstalk.

Great. I will do so.
Btw - a 76ohm ferrite bead like the ones you find on tayda https://www.taydaelectronics.com/axial-ferrite-bead-76-ohm.html
are fine for cgs circuits ?
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [7 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 » Ken Stone designs - CGS
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