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Thread: Low voltage detected

  1. #1
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    Default Low voltage detected

    I'm running FPP v3.3 and upon startup the first line says "low voltage detected", then the boot continues to login.
    LED's don't work on FPP test.

    Whats the best way to power the Raspberry PI (with out the boot saying "low voltage detected")

  2. #2
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    Default Re: Low voltage detected

    Which PI are you using? Are you using a high enough amperage power block? Cell phone USB chargers suck...I've only found one that works well, and thats from Anker. Are you using a good cable - cheap cables cause issues alot.

  3. #3
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    Default Re: Low voltage detected

    I'm using PI 2 B+. I've tried multiple Wall Warts. even a 5 volt 3amp power supply, all say "low voltage detected" and lights still don't work.
    The only thing that I have is a CPT 12v to 5 v converter that works (no "low voltage detected") and LED's work

  4. #4
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    Default Re: Low voltage detected

    Changing Wall Worts likely will not change anything, no matt what amp they are. Even a 50A wort will give low voltage warning.

    I was seeing the same thing, although it did not seem to impede the Pi's performance. I did some testing and found the metal encased white box Power Supplies are best.....they have an adjustable voltage output. I find 5.2V is the best voltage for the Pi. That is, if you keep the PS near the Pi to avoid voltage drop.

    I like the 5V3A units when powering the Pi along. In a control box, I'll still tune the voltage to 5.2v, the pixels are fine at level. And so are BBB's
    In Lights Therapy

  5. #5
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    Default Re: Low voltage detected

    So far the only thing that works for me is the CPT 12v to 5v converter, But that only works sometimes. I power on and don't get "low voltage detected", LED's work,
    the next time I power on, I get "low voltage detected", LED's don't work.
    Last edited by stallionent; 10-23-2019 at 05:30 PM.

  6. #6
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    Default Re: Low voltage detected

    Quote Originally Posted by stallionent View Post
    So far the only thing that works for me is the CPT 12v to 5v converter, But that only works sometimes. I power on and don't get "low voltage detected", LED's work,
    the next time I power on, I get "low voltage detected", LED's don't work.
    What is the voltage output on the CPT 4.9, 4.95, 5.00, 5.05 ???
    In Lights Therapy

  7. #7
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    Default Re: Low voltage detected

    Make sure you are using a high current charging cable. The USB 3.0 fast charge cables deliver more current with less voltage drop.


    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.
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  8. #8
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    Default Re: Low voltage detected

    Change to PI 3, no "low voltage detected. Boot completed, OK

    Still no lights on FPP test.

    All lights work on Falcon v3 test.

  9. #9
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    Default Re: Low voltage detected

    I quit FPP, went to get coffee. tried again to click on desk to icon, now says took to long to load.

  10. #10
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    Default Re: Low voltage detected

    Tried again, FPP boots OK, still no light on test.

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