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Thread: Dimming with LED's flaky above 91%

  1. #1
    Join Date
    Nov 2017
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    Default Dimming with LED's flaky above 91%

    Hello,
    So for the last few years I have had an odd issue. When above 91%, only a couple channels work and they randomly turn on and off between 92%-99% and nothing turns on at 100%. Additionally, some low intensities below 30 (lights are pretty much off by 30%) glitch full brightness. I've gotten around this by simply only programing between 30%-91% intensities. My setup uses a rennard dimmer (595 converter) and both Grinch and 595 boards. Has anyone encountered this issue before? Should I set up dimming profiles for all my channels? Setting each individually would be a huge pain at over 256 channels. Anyways curious if there is an easy fix for this. We run 100% LED lighting.
    Thanks!

  2. #2
    Join Date
    Dec 2009
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    Default Re: Dimming with LED's flaky above 91%

    Do you use a snubber?

  3. #3
    Join Date
    Dec 2012
    Location
    Newtown CT
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    4,408
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    Default Re: Dimming with LED's flaky above 91%

    The renard software needs to be updated to use PWM. The LEDs draw to little current to keep the triacs triggered. The PWM mode gets around this.


    2020 Full sized show reworked for the new location. Only adding (famous last words) 13 RBLs that I finally got converted to using pixels
    2019 - Just moved into a new home (yet another change of plans). Will be dim but not dark. Too much to do at the new place to leave time for a show. Dim show (3000 pixels) had regular visits most nights.
    https://www.youtube.com/channel/UCyX...ttrsZNARkUce0Q

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