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I thought this article was a parody of the people who think they're being poisoned by wifi until I read the comments here. I started looking into it, these poo
by monster_truck 1y ago
I thought this article was a parody of the people who think they're being poisoned by wifi until I read the comments here.
I started looking into it, these poor people are paying hundreds of dollars for "flicker measurement" devices that cannot reliably tell you how the light source you're measuring is controlled
- gblargg 1y agoEven incandescent running on AC has flicker. It's funny when that's used as the gold standard. LED running on DC has less flicker than normal incandescent.
- deleted 1y ago[deleted]
- quesera 1y agoAn LED running on continuous DC has no flicker, but PWM is not continuous DC, it's a square wave of some frequency. Incandescents have analog inertia in the filament which smooths the light output from the AC sine wave. This smoothing is not 100%, but I've never met anyone who can detect it without equipment. A photocell and an oscilloscope will show the smoothed live-frequency wave (I wouldn't call it a "flicker"). The wave delta is relatively higher in the perceptual range as the voltage is lowered to approach the minimum "glow-activation" threshold of the filament -- i.e. the fluctuation is more noticeable when the bulb is dimmed to nearly off.