On 4/13/07, Scott Deyo put forth:
their corresponding outputs are also the same pins on the TL072 and
LM358. So I'm still confused.
exponential FM can be added by simply putting a DC mixer module
before the 1V/Oct input. Then again, I have no idea what be more
useful for the bintic used as a filter.
negative going edges. So I wonder if the duty cycle of the clock
were something other than 50% -- or even if its pulse width was
modulated -- so that the intervals charging and discharging the
capacitors varied, then would that effect the sound of the filter??
It's not shown on the schematic.
On 4/14/07, Peng put forth:
is as a comparator in general, but it's not wired as comparator on
the bintic filter VCO daughterboard.
>Oops... I meant the - and + _inputs_, sorry. That is, the inverting andI just double checked, and the inverting and no-inverting inputs, and
>non-inverting inputs to the opamp. The power supplies are indeed the
>same, and although I use 072, the 358 should also work fine there.
their corresponding outputs are also the same pins on the TL072 and
LM358. So I'm still confused.
> > It's my understanding that a a 1V/Oct input and exponential FM inputI had thought that linear FM would be more of a feature, since
> > would be the same thing.
>
>They are indeed. I almost left off the expo input in favor of linear,
>but I think most people usually use the expo in addition to 1v/oct, so
>there would be more patching.
exponential FM can be added by simply putting a DC mixer module
before the 1V/Oct input. Then again, I have no idea what be more
useful for the bintic used as a filter.
>The Ext Excite is a really just a second input to the filter.I had thought about that. Apparently the clock input is driven by
>An external VCO to clock the filter would be superfluous, I think, as
>the Bintic has its own VCO built in.
negative going edges. So I wonder if the duty cycle of the clock
were something other than 50% -- or even if its pulse width was
modulated -- so that the intervals charging and discharging the
capacitors varied, then would that effect the sound of the filter??
>That's it, though the squares are divided lower, I believe. I don'tWell, I don't know which outputs of the ripple counter are used.
>have the 4024 datasheet here, but I'm pretty sure they are.
It's not shown on the schematic.
>Maybe the 358 would be better. I just had 072s, and they've worked onOK :) I'll look that over.
>around 10 Bintics I've built.
>Follow the Electronotes link on Ken's VCO page to get a full
>description. My mod is from there.
>
>Oh, and critical is good :)
On 4/14/07, Peng put forth:
>I don't know what sort of circuit that uses, or how useful an LM358
>When I built my Gate Sequencer I had problems using the LM358 as a
>comparator. I think the transition time may be too slow. Instead of a
>sharp trigger/pulse, there was a ramping up. This caused the CMOS chip
>trigger/count to be very jumpy.
is as a comparator in general, but it's not wired as comparator on
the bintic filter VCO daughterboard.