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
  Jez Adventures in Sound
Please visit the chat
 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Sequencer by FRGMNT
Post new topic   Reply to topic Moderators: mosc
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
Hollywood



Joined: May 22, 2012
Posts: 13
Location: Ireland

PostPosted: Tue Dec 04, 2012 7:43 pm    Post subject: Sequencer by FRGMNT
Subject description: A lurker looks for luck in Lunetta lunacy
Reply with quote  Mark this post and the followings unread

I found this sequencer design by Frgmnt, but I don't understand how it works (http://frgmnt.org/) Frgmnt introduced me to the wonders of CMOS and my first self-built sound device, a hex oscillator feedback loop, which I use all the time. I've been learning quite a lot lately, so much from this here incredible forum as a lurker, and it's time to get building! I posted here as it is in the spirit of Lunettas for sure.

The sequencer is on page 3 of the attatched PDF, which is released under creative commons, and I hope the original designer doesn't mind! Very Happy


Wooden_Box.pdf
 Description:
An alternative design using two 4051s may be found at http://frgmnt.org/downloads/, but this earlier version uses the extra 4051 as an led driver.

Download
 Filename:  Wooden_Box.pdf
 Filesize:  1.83 MB
 Downloaded:  151 Time(s)

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



Joined: Jun 11, 2009
Posts: 247
Location: Canada

PostPosted: Tue Dec 04, 2012 10:59 pm    Post subject: Re: Sequencer by FRGMNT
Subject description: A lurker looks for luck in Lunetta lunacy
Reply with quote  Mark this post and the followings unread

Hollywood wrote:
I found this sequencer design by Frgmnt, but I don't understand how it works (http://frgmnt.org/) Frgmnt introduced me to the wonders of CMOS and my first self-built sound device, a hex oscillator feedback loop, which I use all the time. I've been learning quite a lot lately, so much from this here incredible forum as a lurker, and it's time to get building! I posted here as it is in the spirit of Lunettas for sure.

The sequencer is on page 3 of the attatched PDF, which is released under creative commons, and I hope the original designer doesn't mind! Very Happy


That sequencer is the combination of a binary counter (4060) and 8-1 multiplexer (4051). The 4060 has an internal oscillator for its clocking frequency which is set by pins 9, 10 and 11. q12, 13 and 14, the final 3 bits of the count, are sent to the multiplexer. the multiplexer can be thought of as an addressable rotary switch. q12, 13 and 14 supply the address for each pole of the switch from 1 to 8. the multiplexer switches which pot goes to the output.

...now this is where things look a bit strange. instead of using the pots as voltage dividers he has chosen to use them as variable resistors, for whatever reason and put an 18k to ground. this is probably not the most ideal use of a sequencer. the CV out will never go to 0V, and the overall range of voltage will depend on the pots being used.

i guess maybe this is to be used with vactrols?...
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Psyingo



Joined: Jun 11, 2009
Posts: 247
Location: Canada

PostPosted: Tue Dec 04, 2012 11:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

oh, it seems he has an updated design http://frgmnt.org/w/wp-content/uploads/2011/01/8-Step-Sequencer.pdf. this makes more sense. as he has the previously unused legs of the pots tied to ground through a variable resistor. this allows you to tune it a bit, overcoming the issue of not having the cv achieve 0 volts as i mentioned previously.
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Hollywood



Joined: May 22, 2012
Posts: 13
Location: Ireland

PostPosted: Wed Dec 05, 2012 6:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you very much! I think that other version is actually older?! I'll pick up another 4051 later and get breadboarding. Frgmnt makes strange things anyway, so I'm very interested to see what it does. The TOB device on page 2 of that pdf is one of my favourite instruments ever, seriously dense fractal harmonic structures and Lunetta rhythms... lovely! Thanks again, it's appreciated.
Back to top
View user's profile Send private message
Psyingo



Joined: Jun 11, 2009
Posts: 247
Location: Canada

PostPosted: Wed Dec 05, 2012 6:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Hollywood wrote:
I think that other version is actually older?! I'll pick up another 4051 later and get breadboarding.


"Today Sergio from Mexico found an old documentation of a sequencer I made in 2007 for Piksel Festival. It contained several small errors, so here is the updated version of this nice 8-Step-Sequencer."

the original is from 2007, but it has been updated (without a date, I am assuming 2011 though, since thats the folder its in in the URL)

There is nothing very strange about that sequencer. It's a common sort of design, having a binary counter drive a multiplexer. it's good. Can be even better if you have a way of generating more interesting counts, like counting up or down, or ping-pong, or random. The 4060 can only count up, you would have to use another counter to get up and down... etc.
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
corex



Joined: Mar 02, 2010
Posts: 106
Location: Las Vegas

PostPosted: Wed Dec 05, 2012 6:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

For a more interesting counter, take a look at the 4516.
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 [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 » 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
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