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 Forum index » DIY Hardware and Software » Developers' Corner
4 Channel Quadrature LFO
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Grumble



Joined: Nov 23, 2015
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Location: Netherlands
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PostPosted: Sat Jan 16, 2021 4:18 am    Post subject: 4 Channel Quadrature LFO
Subject description: Module in progress
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my synth

Last edited by Grumble on Mon Jan 18, 2021 3:44 pm; edited 1 time in total
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Blue Hell
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Joined: Apr 03, 2004
Posts: 23500
Location: The Netherlands, Enschede
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PostPosted: Sun Jan 17, 2021 5:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

hmm something X Y Cool
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Jan
also .. could someone please turn down the thermostat a bit.
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Grumble



Joined: Nov 23, 2015
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PostPosted: Mon Jan 18, 2021 7:09 am    Post subject: Reply with quote  Mark this post and the followings unread

What You see here is the output signal of two of the four outputs of a quadrature LFO, four outputs all 90 degrees shifted and the idea is that you can choose 4 different wave forms for each output. I am playing with the idea to construct each wave form out of four parts of the four wave form types, e.g. you can have one output a clean sine wave, while the next consists of for different parts of wave forms, so you can have the first quarter a sine shape, the next quarter a saw part etc.
But that would take some extra programming... but I’m playing with the idea.
The four leds are red/green leds, so when an output is more positive than 2.5 volt it will light up green, lower as 2.5 volt it will light up red.(starting very dim to more brightness)


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Blue Hell
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PostPosted: Mon Jan 18, 2021 7:48 am    Post subject: Reply with quote  Mark this post and the followings unread

Cool!

I'm finding 120 degrees nice to have too BTW Laughing

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Jan
also .. could someone please turn down the thermostat a bit.
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Grumble



Joined: Nov 23, 2015
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PostPosted: Mon Jan 18, 2021 11:21 am    Post subject: Reply with quote  Mark this post and the followings unread

What is special about 120 degrees?
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Blue Hell
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PostPosted: Mon Jan 18, 2021 11:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Grumble wrote:
What is special about 120 degrees?


That when added up you get constant power.

I use it for (slow) fading three part things, such that the levels can be more or less equal over the course.

Also you can add up two phases to get one inbetween, so a 60 degree phase.

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Jan
also .. could someone please turn down the thermostat a bit.
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Grumble



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PostPosted: Mon Jan 18, 2021 2:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

That makes sense... but would require so much more programming...


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Grumble



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PostPosted: Wed Jan 20, 2021 3:00 am    Post subject: Reply with quote  Mark this post and the followings unread



Demo (allow for subtitles)

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