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Old 16th Jun 2019, 12:31 am   #100
GroovyG
Tetrode
 
Join Date: Nov 2015
Location: Witney, Oxfordshire, UK.
Posts: 96
Default Re: Turntable Stroboscope

Regarding the perceived brightness of the LED, there's a phenomenon whereby a short duration flash is seen as being brighter than one of longer duration, even of the the same actual brightness. It's too long now since I was an optometry student, and I've gone off in altogether another direction since, so the details now elude me, but I'd expect a 208μs flash to be comfortably in the relevant range.
G.
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