[sdiy] Easy expo VCO suggestions for seqencer's LFO clock..

[Tom Wiltshire]

Another nice idea. You could do a lovely simple trip/sqr LFO around a 2164.

T.

==================
       Electric Druid
Synth & Stompbox DIY
==================

> On 6 Oct 2017, at 17:31, Roman <modular at go2.pl> wrote:
> 
> And while we're talking about who's loving what chips, why don't you make that VCO out of V2164? 2164 VCO is so simple it doesn't need a schematics, and if one VCA cell used for temperature compensation you get good enough stability.
> An integrator driven by 2164 followed by comparator with a few volts hysteresis, feeding back to 2164 input. Here's your square wave. And CV input is already exponential.
> 
> Roman
> Dnia 6 października 2017 18:07 Jacob Watters <jacobwatters at gmail.com> napisał(a):
> 
> Because it is a simple vco on a chip and I love tinkering with cmos stuff, so those options usually come to mind first.
> 
> On Oct 6, 2017 10:37 AM, "Jean-Pierre Desrochers" <jpdesroc at oricom.ca> wrote:
> 
> Thanks Jacob,
> 
> 
> But why did you choose the X-4046 VCO from anything ?
> Just curious..
> 
> JP
> 
> ************************************************
> 
> Le 2017-10-06 10:05, Jacob Watters a écrit :
> 
>> A 4046 with an expo convertor might do. Remove all the waveshaping parts from the X-4046 VCO if you need a schematic to follow.
>> 
>> On Oct 6, 2017 9:33 AM, "Jean-Pierre Desrochers" <jpdesroc at oricom.ca> wrote:
>> 
>> 
>> Hi list,
>> 
>> 
>> Anybody have a suggestion for an easy to build expo VCO (1v/oct)
>> that would be used as an LFO for my next sequencer project ?
>> I only need pulses output to drive digital sequence chips
>> and some stability because it's gonna be the sequencer's internal clock.
>> I've been checking around on the web.
>> 
>> 
>> Thomas Henry VCO designs could do but I'm not sure.
>> Again, I only need square (pulses) outputs.
>> 
>> Thanks.
>> 
>> 
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