[sdiy] Square to Sine

[Elain Klopke]

Thanks Andy! I still had my resistors and caps on my breadboard and hooked
up a 2N3904 and plugged in the power and the Tiny Speaker Test agrees that
it works decently.

On Tue, Apr 4, 2017 at 9:41 PM, Andrew Simper <andy at cytomic.com> wrote:

> One way to avoid some of the volume drop is to use a 2 pole sallen key
> BJT filter with a cascaded passive stage. This is a common circuit
> used around BBD chips, eg:
>
> http://www.hobby-hour.com/electronics/s/schematics/boss-
> ce2-chorus-schematic.gif
>
> Andy
>
> On 4 April 2017 at 19:50, Elaine Klopke <functionofform at gmail.com> wrote:
> > Thanks for the info Tom!
> >
> > Magnus, the sources are fixed square waves coming from a set of PIC
> chips. So the fixed filtering doesn't bother me a bit. One filter for one
> frequency. What worries me is the volume drop.
> > _______________________________________________
> > Synth-diy mailing list
> > Synth-diy at synth-diy.org
> > http://synth-diy.org/mailman/listinfo/synth-diy
>
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