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A comment on A method for improving Milky Way exposures in light pollution. Parent comment

Re:A method for improving Milky Way exposures in light pollu... by NickNameNick on Tuesday September 12, 2017 @03:56AM (#15225569)
It's going to be a bit trickier than that, because power is usually distributed as 3-phase, not single-phase.

So that's 3 different offsets, depending on which phase any given light is wired into.

Plus that's probably going to be slow enough to cause visible flicker.

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Re:A method for improving Milky Way exposures in light pollu... by hxtk on Tuesday September 12, 2017 @09:01AM (#15226896)
Have it trigger on a voltage threshold. 3 phase means you're hitting 0V 6x per cycle so that'd bring the pwm up to 720Hz.
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