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 Forum index » DIY Hardware and Software » Thomas Henry designs
Controller LFO
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Thomas_Henry



Joined: Jul 24, 2009
Posts: 127
Location: N. Mankato, MN

PostPosted: Thu Aug 09, 2012 5:57 pm    Post subject: Controller LFO
Subject description: Includes a full length article explaining it
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Hi gang,

Well here we go again with another project. This really is the best LFO I've done to date, from a musical point of view. There are lots of features and its behavior is very smooth on all fronts, if that makes sense.

Also included is a complete article I wrote up for it. I had originally intended this to go to a magazine, but somehow things got in the way.

As usual, I would appreciate it if you keep this stuff for your own personal use and not pass it around or try to go commercial with it. Always link back to the source in EM. Get in touch if you feel the need to do a PCB or something.

Dig in!

Thomas Henry


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Schematic --- Sheet 1
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Schematic --- Sheet 2
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Front Panel
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Parts List
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LFO Controller.pdf
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Article

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elmegil



Joined: Mar 20, 2012
Posts: 1345
Location: Chicago
Audio files: 14

PostPosted: Thu Aug 09, 2012 6:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

Excellent, I like this one a lot. Thank you very much for sharing it with us!

I was listening to a bunch of string music on my drive today (Zoe Keating and Paul Giger, both highly recommended) and thinking about how you could patch things to be able to simulate some of the delayed vibratos etc, and had been thinking in terms of "another VCA" to fade in the LFO. With this it's right there in the mix. Very Happy
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Fri Aug 10, 2012 12:45 am    Post subject: Reply with quote  Mark this post and the followings unread

and i built it already!!!
(i added a range switch, though)

TH_LFO2011_FP

TH_LFO2011_PCB

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cheers,
matthias
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bod



Joined: Apr 28, 2009
Posts: 144
Location: Glasgow

PostPosted: Fri Aug 10, 2012 4:19 am    Post subject: Reply with quote  Mark this post and the followings unread

damn you mr henry!!!!!! i used to hate the hummble 555!! Laughing its amazing the functionality you can squeeze out of it!
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marvkaye



Joined: Mar 14, 2011
Posts: 225
Location: Fla

PostPosted: Fri Aug 10, 2012 5:58 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
and i built it already!!!
(i added a range switch, though)


Fastest build in history... docs here Thursday, completed module on Friday. I hope you are adequately rewarding your elves. Wink

<marv>
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J3RK



Joined: Jun 05, 2006
Posts: 98
Location: Seattle

PostPosted: Fri Aug 10, 2012 10:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Very cool design Thomas, and beautiful module Fonik!

I think I need to build one of these.
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Fri Aug 10, 2012 12:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

as you can see, the PCB has been designed a couple of months ago when i had the privilege to do a testbuild of thomas' new LFO.

thomas gave me a go now, and so i will offer PCBs for this project soon. i will start a new thread, though.

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cheers,
matthias
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delayed



Joined: Jun 24, 2008
Posts: 129
Location: TN

PostPosted: Sat Aug 11, 2012 1:41 am    Post subject: Reply with quote  Mark this post and the followings unread

any chance of posting a link to those AL knobs and the led holder/lens cap?
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StephenGiles



Joined: Apr 17, 2006
Posts: 481
Location: England

PostPosted: Sun Aug 12, 2012 8:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks very much, I will have time to study this without being disturbed soon by the hotel pool near Alicante in Spain - my wife will be far too busy sunbathing!
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Tue Aug 21, 2012 1:25 am    Post subject: Reply with quote  Mark this post and the followings unread

just wanted to give you an update:
the timeframe is not set, yet. i could offer the PCB as i originally designed it right now, however, quite a few people wanted an additional PCB for front panel components in eurorack format.
in order to achieve this, i have to re-design and modify the layout and design th eadditional front panel components PCB.
i will have to order another set of these new layouts for testing purposes befor i can offer the final product.
i will NOT offer front panels.

@delayed: i found these parts in my drawer, i have no idea where i got them - maybe from www.reichelt.de, where i order a lot of parts, however, they have a MOQ of 150.-EUR for foreign orders and their page is in german only...

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matthias
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delayed



Joined: Jun 24, 2008
Posts: 129
Location: TN

PostPosted: Sat Aug 25, 2012 12:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the reply.
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Tue Oct 09, 2012 1:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

so here are the new PCBs:
Circuit PCB providing footprints for MTA100 headers. This enables almost any format.
Eurorack front panel components PCB, which can be mounted back to back with the circuit PCB using single row connectors, enabling building without wiring.

will start populating the test build today.

TH LFO 2011

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cheers,
matthias
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State Machine
Janitor
Janitor


Joined: Apr 17, 2006
Posts: 2730
Location: New York
Audio files: 23

PostPosted: Wed Oct 10, 2012 4:16 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice work Matthias ! Beautiful boards Cool
Eager to hear the results ... Very Happy
Bill
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elmegil



Joined: Mar 20, 2012
Posts: 1345
Location: Chicago
Audio files: 14

PostPosted: Tue Oct 16, 2012 6:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Is it soup yet? My paypal is palpitating Smile
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Tue Oct 16, 2012 10:53 am    Post subject: Reply with quote  Mark this post and the followings unread

i assembled the boards, alas, the whole trigger/delay/lag part is not working yet. will hae to troubleshoot it.
cannot be a big deal, since the actual circuit board is tested already (made only a few adjustments to make the PCB smaller).
we will see later this week... so stay tuned.

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matthias
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Tue Oct 16, 2012 1:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

anyways, more teasing? here we go:

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cheers,
matthias
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ruidobello



Joined: Oct 17, 2012
Posts: 1
Location: San Francisco

PostPosted: Wed Oct 17, 2012 4:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Matthias, are the PCBs available?
I'll love to get 2 sets.
Cheers
jorge
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Fri Oct 19, 2012 2:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

i don't offer PCBs yet, however, your order has been taken. i will evaluate the estimated prices on monday.

anyways, here is the finished module in the layout i chose for my next cabinet. alas, i totally messed up the modes labeling: 'Gate' should read 'Delay', and 'Trigger' should read 'Gate' - obviously i was thinking ADSR when doing the front panel!?

Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.

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matthias
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Mon Oct 22, 2012 7:39 am    Post subject: Reply with quote  Mark this post and the followings unread

i am offering PCBs now (taking advance orders, at least):
http://electro-music.com/forum/topic-55470.html

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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Wed Oct 24, 2012 1:00 am    Post subject: Reply with quote  Mark this post and the followings unread

here is a very short demo of the Controller LFO. NOTE that i mixed up the labels of the mode switch: Trigger should read Gate, and gate should read Trigger.


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matthias
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Danno Gee Ray



Joined: Sep 25, 2005
Posts: 1341
Location: Telford, PA USA

PostPosted: Wed Oct 24, 2012 5:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

You two frickin ROCK !
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dave_3283



Joined: Jan 30, 2009
Posts: 28
Location: Dallas TX

PostPosted: Fri Oct 26, 2012 1:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

So, one thing that's not immediately clear to me is using this as a free-running LFO. Are the jacks on the right needed for this, or can you just put it in trigger mode and it runs free until a trigger restarts the attack stage of the VCA? As I'm typing it, that makes the most sense to me...
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Sat Oct 27, 2012 12:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

dave_3283 wrote:
So, one thing that's not immediately clear to me is using this as a free-running LFO. Are the jacks on the right needed for this, or can you just put it in trigger mode and it runs free until a trigger restarts the attack stage of the VCA? As I'm typing it, that makes the most sense to me...

no. without anything put into the trigger or gate input, no matter what position the mode switch is, the LFO is free running, even the controll output.
the additional outputs are alwayt running, exept in gated mode. and they offer two more functions: triggger out, and gate out (positive only).

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matthias
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