Hi That is just what I have done. I mentioned that I use an app called SpectrumView and have continuously adjusted the PWM frequency, not the duty cycle.
> On Feb 24, 2019, at 1:08 PM, Mac Doktor <themacdok...@gmail.com> wrote: > > [This is my first post here. I haven't had time to introduce myself yet. My > apologies if I'm just saying something everyone already knows.] > > >> On Feb 24, 2019, at 9:33 AM, Paul Andrews <judge2...@gmail.com> wrote: >> >> With no dimming/fading there are noticeable peaks at 4KHz, 8KHz and 12KHz, >> 12KHz is the upper limit of the frequency scale I was using). > > Try sweeping the frequency instead of the duty cycle to see how the volume > (and spectrum) of the sound changes. > > As already suggested, hooking a microphone or piezo transducer up to a > spectrum analyzer or even just an oscilloscope would be enlightening. > > > [Proper introduction to come...] > > > Terry Bowman, KA4HJH > "The Mac Doctor" > > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/h8BMlkUhkZw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send an email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/88AA2D17-37C4-4450-8F63-EC5C0F0E7E13%40gmail.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/082948D2-0F7D-49E1-9133-493A39BA81CB%40gmail.com. For more options, visit https://groups.google.com/d/optout.
