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This combination of pulse width modulation and phase shifting
can create spectacular visual effects—allowing you to present
entire
sections of a rainbow in each pulse period.
Pulse width
is set by an integer value ranging from 0 (not on at all)
to 255 (on all the time); these are the equivalent of 0% to 100%.
A pulse width of 127, then, would be about 50%--a square wave.
For single colors, our experience indicates that pulse widths in
the 20-40% range produce the most interesting visuals, but this
should only be taken as approximate guidance, since the effect of
mixing colors with a variety of pulse widths is a new area for
research.
Notice that a fundamental difference between the pulse, sine and
triangle waveforms is that, while the pulse waveforms turn on
and off instantly, sine and triangle waveforms increase from
minimum to maximum in a smooth manner.
Try experimenting with the sine and triangle waveforms when
the pulse rates are low, especially in the 1 to 8 hz range, and
pulse waveforms when the pulse rates are in higher ranges (8+
hz).
Example approximate pulse width settings
Pulse width
%
Setting
Pulse width
%
Setting
10
25
60
153
20
51
70
178
30
76
80
203
40
102
90
229
50
127
100
255
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