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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
Adding GATE to Utility LFO
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whomper



Joined: Dec 15, 2007
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PostPosted: Sun Jan 25, 2009 1:04 pm    Post subject: Adding GATE to Utility LFO Reply with quote  Mark this post and the followings unread

Hi,

Is there any simple way to add a gate to CGS's Utility LFO in order to re-trigger it?

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Erez Yaary

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whomper



Joined: Dec 15, 2007
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Location: Israel
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PostPosted: Tue Feb 10, 2009 7:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey, saw no response.... Sad

Isn't there any way to add, maybe a small circuit, a trigger/gate input to retrigger the LFO as well as voltage control it?

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slacker



Joined: Nov 18, 2007
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PostPosted: Tue Feb 10, 2009 12:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

If you briefly short out the 47n cap in the integrator that will reset the LFO.
You could use a FET in parallel with the cap in the same way as in the CGS VCO, then you just need trigger/pulse generator to control it.
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whomper



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PostPosted: Tue Mar 03, 2009 2:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi,

Just found some time to try this idea out. Would I need to build a small circuit in the lines of the 2 yellow circles in the attached diagram or just connect the FET and connect the in trigger to it?


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