BJ's 4046, PM, additive waves!

[Bjorn Julin]

>    http://home.swipnet.se/~w-133242/4046.htm
>
>Fascinating.  Of course I have some comments...

Your most wellcome.

>That's a lot of waveforms.  And very strange looking waveforms.

>While the waveform are unusual, I think the interesting part of your
>project is how the waveforms are affected by the phase modulation.

Yepp.

>You missed the waveforms that I would have tried first; the sawtooth-
>fragment (tap the signal off just one side of the capacitor) and the
>triangle (the difference between the two sides of the capacitor).

In the first case its not a miss, i just didnt found it
so interesting it sounds more like a square, but for LFO usage
it has its usage.Second there is no triangle wave available at the core, the 
core produces 90 deg outoff phase sawtooths, theroff the double frequency 
saw and triangle..

>I don't trust that noise generator.  Are you sure it's not triggering
>electric garage doors all over your neighborhood?

Your right, idont trust it either, :-) but still it was so simple
and sounded so crasy i just used it.The triggering is from
the race in the feedback loop (noise) therfor i mentioning
that to help the cirquit one could feed some analog noise into
its input.I have not tested that yet.

I have been looking for various sources of triggering,
like refrigerator, garage dor etc engine and RF sources
as triggers for the Xor and i cant find any!!

>It looks like your sync input is really a half-sync.  The flop inside
>the 4046 keeps an internal state when the two capacitor pins are
>grounded.  Not that that's necessarily a bad thing. :-)  Grounding >one 
>capacitor pin and driving the other positive should perform a >more 
>complete sync.

In the first design , no its not, in the second yes it is,
and i do mentioning in the text about pulling the
other saw to V+. :-)

>Neat stuff!
Yepp!

Reg
BJ
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