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 Forum index » DIY Hardware and Software » Circuit Bending
Adding a new LFO for PWM to a Moog Minitaur
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axg20202



Joined: Mar 11, 2013
Posts: 20
Location: London

PostPosted: Mon Mar 11, 2013 5:52 am    Post subject: Adding a new LFO for PWM to a Moog Minitaur Reply with quote  Mark this post and the followings unread

Hello. Long-time member of DIYstompboxes but new here. Can't believe I didn't find this place sooner!

Subject line says it all. Anyone have any thoughts on how to do this?
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varice



Joined: Dec 29, 2004
Posts: 721
Location: Northeastern shore of Toledo Bend
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G2 patch files: 49

PostPosted: Mon Mar 11, 2013 5:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi axg20202,

welcome to the electro-music.com forum Exclamation

That would be an interesting modification. It sure would help to have a schematic. The last time that I asked though, Moog Music does not usually release them. But technical support did offer some suggestions when I was making a modification to my moogerfooger. So I would suggest that you send them an email.

Have you opened up the Minitaur yet to take a look inside? I would start by looking to see if there are trim pots used to adjust the duty cycle (pulse width) of the square waves of each oscillator. If so, that may be a starting point to find a way to do PWM.

Good luck! Keep us updated on how this works out.

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varice
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axg20202



Joined: Mar 11, 2013
Posts: 20
Location: London

PostPosted: Tue Mar 12, 2013 5:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the welcome.

Yes, I think I need to have a poke around in there. I know that the board has various test points that could lend themselves well to splicing in new components. If there is a trimmer for pulse width I will be in business as I should just need to slap in an LFO (he said, casually).
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axg20202



Joined: Mar 11, 2013
Posts: 20
Location: London

PostPosted: Tue Mar 12, 2013 6:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Assuming I just need to add an LFO to modulate the pulse width, can someone recommend a suitable LFO circuit for this application?
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