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Re: [Phys-l] Lissajous

Writing of Lissajous, here's Bryan's harmonic visualizer:

Here's his cube of harmonies. Cut in wood w/ his CNC mill.

And here's his home built CNC router that cut the above.

bc been kicking himself ever since he turned down Bryan's offered sale of a prototype CNC'd router for much less than cost.

On 2009, Aug 30, , at 20:03, chuck britton wrote:

re: the 60Hz wal signal

On Aug 30, 2009, at Aug 30(Sun) 8:22 , John Denker wrote:

Fixed? Not really.

The long-term average frequency is very closely
controlled ... but there is a huge amount of
short-term frequency modulation.

Here's some data on the 'huge' shot-term variation.

not very large on a percentage basis.

data stolen from:
Forum for Physics Educators