[sdiy] modding an lfo to have reset/sync

[Danjel van Tijn]

If I follow Amos's plan, do I need anything else at the control pin?

i.e. Do I just wire a jack straight to this pin and then feed it a
reset pulse from another module? or do I need some kind of input
protection (i.e. Zener) or any filtering?

thanks,

    Danjel



On Wed, May 13, 2009 at 7:44 PM, Amos <controlvoltage at gmail.com> wrote:
> often it's done by putting a pulse to an analog switch (like a cd4066,
> cd40106, cd4053, etc) control pin, so that the switch shorts the cap to
> ground for a moment.  The rest of the time the switch control pin is low and
> thus the switch does not affect the timing cap.
>
> Cheers,
>
> Amos
>
> On Wed, May 13, 2009 at 10:31 PM, Danjel van Tijn <danjel at gmail.com> wrote:
>>
>> I have a Livewire Vulcan that I would like to modify so that it has
>> reset capability.
>>
>> When I take it apart it is pretty clear to see where the timing caps
>> are (a pair for each lfo, one small one large for the different time
>> range).
>>
>> Anyone know an easy way to reset them? I had read something before
>> about injecting a pulse into the timing cap...
>>
>>
>>
>> cheers,
>> Danjel
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>
>