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 
 Forum index » DIY Hardware and Software
Add sync to LFO
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
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
isak



Joined: Dec 13, 2009
Posts: 627
Location: Israel
Audio files: 18

PostPosted: Sun Sep 22, 2013 7:41 am    Post subject:  Add sync to LFO Reply with quote  Mark this post and the followings unread

Hi Guys.

i have this great MFOS LFO which i love very much, i want to add to it (if its possible) a gate in for it to be synced with a sequence.
is it possible?
any idea on how to do it?

the scheme is attached below...

thank you in advance.
cheers,
Isak E.


single LFO.PNG
 Description:
 Filesize:  19.2 KB
 Viewed:  57 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

single LFO.PNG



_________________
http://www.myspace.com/mgmtrance
Back to top
View user's profile Send private message
modulus in moduli



Joined: May 14, 2010
Posts: 17
Location: USA

PostPosted: Mon Sep 23, 2013 10:50 am    Post subject: Re: Add sync to LFO Reply with quote  Mark this post and the followings unread

Isak,

This looks like an integrator with schmitt-trigger tri-core oscillator. You'd have to build reset circuitry for both capacitors and the schmitt trigger.

It is much easier to add a sync to a saw-tooth oscillator. The reset circuitry is already there and you would only have to add an extra input to that.

Unless somebody has a better idea I think it would be easier to build a second LFO with reset than to add a reset to this one.
Back to top
View user's profile Send private message
isak



Joined: Dec 13, 2009
Posts: 627
Location: Israel
Audio files: 18

PostPosted: Mon Sep 23, 2013 11:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you for your reply.

Can you please show or attach the reset circuit and please show me on the scheme where should I connect it exactly?

I thank you in advance.

Cheers.

_________________
http://www.myspace.com/mgmtrance
Back to top
View user's profile Send private message
feggster



Joined: Sep 12, 2011
Posts: 50
Location: uk

PostPosted: Mon Sep 23, 2013 12:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

maybe the sync circuit from tim servo ?
http://electro-music.com/forum/topic-49081-25.html
Back to top
View user's profile Send private message
isak



Joined: Dec 13, 2009
Posts: 627
Location: Israel
Audio files: 18

PostPosted: Mon Sep 23, 2013 9:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thank you for the link Smile

If I ubderstand this correctly I need to connect Tim scheme between the C1 and C2 in MFOS scheme, right?
Any direct replacement to the 2N3819?

Cheers

_________________
http://www.myspace.com/mgmtrance
Back to top
View user's profile Send private message
modulus in moduli



Joined: May 14, 2010
Posts: 17
Location: USA

PostPosted: Wed Sep 25, 2013 10:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Good find, feggster! And very interesting circuit.

Isak, the 8k LFO is so similar to the schematic you presented that this has a good chance of working.

C1 in Tim's circuit is your C21, and then C22 will automatically be connected when engaged. It looks like the 2N3819 JFET is used as a switch so that any JFET should work.
Back to top
View user's profile Send private message
isak



Joined: Dec 13, 2009
Posts: 627
Location: Israel
Audio files: 18

PostPosted: Wed Sep 25, 2013 2:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool! Thank you Smile

I'll try that (hope soon) and report back.
Thank you for the help guys.

Cheers.

_________________
http://www.myspace.com/mgmtrance
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
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
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
AmbiphonicDSP

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