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Thread: PWM - What is it, How does it work and how to detect it.

  1. #331

    Default Re: PWM - What is it, How does it work and how to detect it.

    I actually see dots when I swing the FourSeevens light, but the camera sees the blur I posted.

    I know it is not PWM, the light uses Constant Current, or as I like to call it, Constant Flicker.. LOL

    I did swing the Q123 as fast as I possibly could, in an attempt to get a photo that showed the dots that I see with my eyes, but what you see is what my iPhone captured.

    My HDS produced dots when I waved it fast, I believe it IS using true PWM.. Though HDS claims they use a type of circuit they call Constant Power, yet another variant in the range of circuits that produce flicker.

    My Olights also show blurred dots, like the Foursevens (maybe because Olight makes FourSevens branded lights)...

    ----
    moving on past the Quarks..

    An example of PWM from this post:
    Last edited by jon_slider; 08-02-2019 at 01:13 PM.

  2. #332
    Enlightened
    Join Date
    Apr 2012
    Location
    Middle of Texas
    Posts
    25

    Default Re: PWM - What is it, How does it work and how to detect it.

    I just posted a way too long thread about using a computer and sound card to measure PWM.
    Good night time reading for those needing to nodd off...

    https://www.candlepowerforums.com/vb/showthread.php?461093-Measure-PWM-using-a-Computer&p=5330349#post5330349

    All the Best,
    Jeff

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