Daniel Quinn wrote: ↑Sat Jul 10, 2021 9:39 am
I think you are overestimating my level of knowledge.
I'm a lawyer , my electronics knowledge is rudimentary.
Very little electronics required. Customize MP3 player, plug into stereo amp, plug amp into 2 transformers, plug 2 transformers into synchronous motor. Fiddle with phase, frequency, amplitude, maybe even waveform shape.
The MP3 player plays samples at a rate of over 44ksps, so it's quite low noise and distortion compared to your typical CMOS or TTL referenced oscillator, no need to aggressively filter out harmonics. But as i said, fiddly.