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OSC303 PWM mod. ?
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Author OSC303 PWM mod. ?
echoplex
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PostPosted: Fri Apr 29, 2011 12:14 pm    Post subject: OSC303 PWM mod. ? Reply with quote Add User to Ignore List

OSC303 by Din Sync is a great sounding oscillator!

The only thing I miss is the option of PWM.
Is there any modification to have the option of PWM?

I remember a thread in which somebody mentioned PWM modification on OSC303..
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Dirk95100
Wiggling with Experience


Joined: 20 Apr 2011
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PostPosted: Sat Apr 30, 2011 8:01 am    Post subject: Reply with quote Add User to Ignore List

http://forums.adafruit.com/viewtopic.php?f=13&t=6389&sid=fd2299771cc4b c74e952bee72c4cc369

I think Phono is lurking here to, so if he could chip in that would be Rockin' Banana!
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phono1337
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PostPosted: Sat Apr 30, 2011 8:20 am    Post subject: Reply with quote Add User to Ignore List

Dirk95100 wrote:


I think Phono is lurking here to, so if he could chip in that would be Rockin' Banana!


im am lurking indeed, i also made the OSC303 lol

that old thread is valid since its the same resistor number, but i did post something on here more recently which is more relevant

http://www.muffwiggler.com/forum/viewtopic.php?t=31693&postdays=0&post order=asc&start=15

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echoplex
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PostPosted: Sat Apr 30, 2011 8:55 am    Post subject: Reply with quote Add User to Ignore List

Oh great, that sounds simple.
Have you already tried this and built one with PWM modification?

@Paul: adapting the modification using a LED&LDR Combo (which is a vactrol) is a cool idea but vactrols are not fast! They are slow and time-lagging..
So isn't this a problem using vactrols to make a cv control?
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phono1337
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PostPosted: Sat Apr 30, 2011 9:02 am    Post subject: Reply with quote Add User to Ignore List

echoplex wrote:
Oh great, that sounds simple.
Have you already tried this and built one with PWM modification?

@Paul: adapting this using a LED&LDR Combo (which is a vactrol) is a cool idea but vactrols are not fast! They are slow and time-lagging..
So isn't this a problem using vactrols to make a cv control?

edit:@paul: the audio links it his adaffruit forums don't work anymore cry


yeah its pretty old links ive moved a lot of stuff from my webspace recently, dont think i have them anymore.

There are several ways to do it, google voltage controlled resistor for some ideas.

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Kakihara
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PostPosted: Sat Apr 30, 2011 11:36 am    Post subject: Reply with quote Add User to Ignore List

owwww nice!!! Gonna do that soon hehehe

g.

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Heathfinnie
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PostPosted: Sat Apr 30, 2011 1:33 pm    Post subject: Reply with quote Add User to Ignore List

Wish I could still get one of these...
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phono1337
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PostPosted: Sat Apr 30, 2011 1:37 pm    Post subject: Reply with quote Add User to Ignore List

Heathfinnie wrote:
Wish I could still get one of these...


the CCCP version will be released later this year w00t

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sparks
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PostPosted: Sat Apr 30, 2011 2:00 pm    Post subject: Reply with quote Add User to Ignore List

I've got two of 'em badboys and they get more use then my other OSCs put together. Love em, by far the most Bang for the buck I put in my rack to
date.

They are pure BUTTAH SlayerBadger!

If history have thaught me anything I'll be on place 1-4 on the waitinglist for the 303VCF.
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Denis Goekdag
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PostPosted: Sat Apr 30, 2011 2:35 pm    Post subject: Reply with quote Add User to Ignore List

You could use a Doepfer universal Vactrol module I guess.

Another PWM-ish sounding option is to set two OSC303 very close to eachother in frequency, then patch their pulse outputs into the input and cv input of a fast VCA like the Azimuth. The beat frequency between the two OSC303 will then kind of be your PW mod frequency.

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Dirk95100
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PostPosted: Sun May 08, 2011 8:05 am    Post subject: Reply with quote Add User to Ignore List

Is there also a sync mod?
Soft and hard like the system 100.)
And lin FM?

That would make it the ultimate vco for me.
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Prunesquallor
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PostPosted: Sun May 08, 2011 10:43 am    Post subject: Reply with quote Add User to Ignore List

phono1337 wrote:
Heathfinnie wrote:
Wish I could still get one of these...


the CCCP version will be released later this year w00t


Would you consider adding the PWM mod to that run? hyper

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echoplex
Ultra Wiggler


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PostPosted: Mon May 09, 2011 6:32 am    Post subject: Reply with quote Add User to Ignore List

Denis Goekdag wrote:
You could use a Doepfer universal Vactrol module I guess.

Another PWM-ish sounding option is to set two OSC303 very close to eachother in frequency, then patch their pulse outputs into the input and cv input of a fast VCA like the Azimuth. The beat frequency between the two OSC303 will then kind of be your PW mod frequency.

This is a great idea how to get there! Thank you..

Prunesquallor wrote:
Would you consider adding the PWM mod to that run? hyper

Nooo, then I had to sell my OSC303's or trade them for CCCP's..
But seriously folks, I think there is not even enough space on the panels to add the PWM mod on this..
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acidphakist
*Probably* not a cyborg.


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PostPosted: Wed May 11, 2011 3:49 pm    Post subject: Reply with quote Add User to Ignore List

I'm curious why someone would take an oscillator whose sole purpose is to be faithful to that of the tb-303 and "invalidate the warranty" with such an impure mod.
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Knobtwister
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PostPosted: Wed May 11, 2011 5:00 pm    Post subject: Reply with quote Add User to Ignore List

phono1337 wrote:
Heathfinnie wrote:
Wish I could still get one of these...


the CCCP version will be released later this year w00t


Fuck yes!
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