XPost: alt.home.repair, uk.d-i-y   
   From: Gothberg"@internet.co.is   
      
   On Thu, 20 Dec 2018 04:24:20 -0000, Clare Snyder  wrote:   
      
   > On Thu, 20 Dec 2018 00:08:22 -0000, "William Gothberg" <"William   
   > Gothberg"@internet.co.is> wrote:   
   >   
   >> On Wed, 19 Dec 2018 23:53:42 -0000, Rod Speed    
   wrote:   
   >>   
   >>>   
   >>>   
   >>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in message   
   >>> news:op.zt920ry6o5piw3@desktop-ga2mpl8.lan...   
   >>>> On Wed, 19 Dec 2018 16:21:41 -0000, Mark Lloyd  wrote:   
   >>>>   
   >>>>> On 12/19/18 6:01 AM, William Gothberg wrote:   
   >>>>>   
   >>>>> [snip]   
   >>>>>   
   >>>>>> They probably are fairly crude.  I know they flicker, for example if I   
   >>>>>> use my cordless drill, the chuck appears to spin the wrong way under the   
   >>>>>> LED lighting.   
   >>>>> I remember seeing that with a washing machine (under fluorescent   
   >>>>> lights). As the tub was slowing down, the row of holes around the tub   
   >>>>> would appear to reverse direction. Same thing with (spoked) wagon wheels   
   >>>>> in movies.   
   >>>>   
   >>>> It looks absolutely ridiculous with modern cars with LED headlights in   
   >>>> films.  How hard can it be to put a smoothing capacitor on the output of   
   >>>> the power supply?   
   >>>   
   >>> No point when the only thing that has a problem is videos.   
   >>>   
   >>> You don't even see a problem with dashcams.   
   >>   
   >> You should.  Surely they operate in a similar way to movie cameras?   
   >   
   >   
   >  Different frame rates.   
      
   But unless they're identical to the LED flicker rate, you'd still see the   
   effect.   
      
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