XPost: uk.rec.driving   
   From: no@spam.com   
      
   On Tue, 23 Apr 2013 09:56:27 +0100,  wrote:   
      
   > On Mon, 22 Apr 2013 19:44:38 +0100   
   > "Major Scott"  wrote:   
   >> Surely they can design LED lights on cars to have a higher frequency PWM=   
   >> ?  Even =A3100K cars flicker dramatically, especially when filmed.  It m=   
   >> akes them look really cheap.  All it would take is a higher frequency PW=   
   >> M, or a smoothing capacitor?   
   >   
   > They flicker for a reason. If they smoothed the current they might just as   
   > well use DC direct from the battery.   
      
   No, provide them with a lower DC voltage to make them dimmer.  Say 12V for   
   brake and 9V for tail.   
      
   > I don't know the technical reasons why but   
   > apparently using the equivalent DC voltage required to get the same   
   brightness   
   > as you can get by strobing them would burn them out. I'm sure some   
   electronics   
   > guru on here can explain more. But it does lead to interesting effects on   
   > video as you say :o)   
      
   So you're saying that on brake they are also strobed?  I have never noticed a   
   brake strobing.  It's the tails that do it.   
      
   --   
   If vegetarians eat vegetables, what do humanitarians eat?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)