[sdiy] Tempo/Clock-to-CV conversion

[David Moylan]

You can use the digital method you described but you could also do the 
same thing with rising or falling (depending on the polarity of CV 
desired) voltage and a sample/hold.  You could probably get away with a 
transistor current source charging a cap, or an opamp, or use a 555. You 
would sample the voltage and then reset the rising ramp.  The Roland 
GR-300 used this method to derive a CV from the incoming guitar pitch. 
The only difference is the frequencies you're working at.

The digital version suffers from possibly limited resolution, but can be 
setup to have infinite sample hold if you use a latch.  Of course the 
analog version won't have infinite hold but may be better for resolution.

Dave

Florian Anwander wrote:
> Hi  David
> 
>> Florian Anwander wrote:
>>> I am lookong for an easy possibility to convert a clockrate into a 
>>> CV.[...] 
>> Where is the tempo coming from?  Is it an analog clock pulse?
> Yes. There will be perhaps a conversion from MIDI-Clock before. But it 
> should work definitely also with analogue clock pulses. Pulse length 
> will be converted too (to quite short pulses).
> 
> Florian
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