Howdy,

Has anyone used Don Lancaster's magic sinewaves with a PIC?  These binary
strings are supposed to generate sinewaves with very little harmonics.   How
does this technique compare to using an eight bit port and a resistor ladder
arrangement?  (Obvious advantage of  the magic sinewave is that it only requires
one or two output pins.)  (  Link to magic sinewave is http://www.tinaja.com/  )

Another question :  How do I evaluate the harmonic content of a particular
scheme?  I have the student edition of MATLAB and MATHCAD.  (These are not the
current versions, as my student days was a while ago).  Does anyone have a
sample file on how to get MATLAB to calculate this?

Thanks.

------ Steve