[sdiy] someone asked for a sine-to-tri converter

[JH.]

As I'll need it soon anyway, I've designed one right now:
http://www.oldcrows.net/~jhaible/matrix_fx/jh_sin2tri_sch.pdf

Of course the triangle waveform isn't perfect, but certainly good enough
for what I have in mind:
http://www.oldcrows.net/~jhaible/matrix_fx/jh_sin2tri_plot.pdf

Two caveats:

(1) So far, simulation only. Not tested in real life.

(2) By it's nature, using the reciprocal function of a tri-to-sine
converter,
      a very constant input (sine) amplitude is required.

Oh yes - I start with 10Vp (20Vpp) sine wave. But anything above 3.18Vp
will do; just change the input divider accordingly. But calculate it
_precisely_
- see (2) above.

JH.