[sdiy] Best ideas for (2) MN3004 BBDs?

[Harry Bissell Jr]

Hi Amos...

I'd suggest building a FIRE with them :^P (inline)

--- Amos <controlvoltage at gmail.com> wrote:

> Hey all...
> 
> I just scored a pair of MN3004 BBD chips and would
> like to build something
> cool with them.
> Do I need the associated clock chips, or can I clock
> them from a homebrew
> VCO/LFO of some sort? 

You could clock them from a biphase clock, usually
generated with a CD4013 D-FF etc. There are a million
ways to do this.  Having a good non-overlapping clock
is important.

Does anyone have a link to
> some good projects for this
> one? According to the datasheet I can get 25.6ms max
> delay from each chip, I
> am assuming this could be underclocked for longer
> lo-fi delay though.

You must have filtering on the input and output to
remove any harmonics that would be outside of the
'Nyquist" sampling limit. The clock must be 2X the
highest harmonic present in the input signal.

If you bring the clock down into the human hearing
range, the output filter MUST be able to remove it
or you will hear a horrible whine.

I'd study all the delay drojects at geofex.com
diystomboxforum, etc...

H^) harry (did I say BBDs suck ??? :^)
> 
> All ideas/opinions welcome... thanks!
> 
> -Amos
>