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Paar leds gaan steeds aan

Discussion in 'Dutch Talk' started by Fire69, 13 June 2016.

  1. Fire69

    Fire69 New Member

    Messages:
    14
    Hardware:
    RPi1/Zero, RPi2
    Ok, so I installed a new OSMC without Hyperion. Result, first 1 or 2 leds turn on after some time. After a couple of hours, the entire right side of my tv was lit white/blue.
    So definitely not a Hyperion problem...

    I'm going over to the OSMC forum to ask what could be causing this.
     
  2. TPmodding

    TPmodding Administrator Staff Member Administrator

    Messages:
    609
    Hardware:
    RPi1/Zero, RPi2, RPi3, +Arduino
    could be more hardware based then software... do you have a capacitor right befor your led strip?
     
  3. Fire69

    Fire69 New Member

    Messages:
    14
    Hardware:
    RPi1/Zero, RPi2
    Honestly, not a clue... It's a Lightberry, didn't build it myself. :unsure:
    But if it could be hardware based, why don't I have problems with my 'older' install of OSMC?
     
  4. TPmodding

    TPmodding Administrator Staff Member Administrator

    Messages:
    609
    Hardware:
    RPi1/Zero, RPi2, RPi3, +Arduino
    hmm ok, dont have any experience with lightberry :/
     
  5. Pryxus

    Pryxus New Member

    Messages:
    8
    Hardware:
    RPi3
    Hello

    and sorry for not responding for a long time. I was in hospital the last 14 days and of course, I had no time and not my mind focused on ambilight problems. But I now can give you the specs of my system:

    It's a tutorial based selfmade solution with a Raspberry Pi 3 that controls 101 WS2801 LEDs. I don't use any grabber since Kodi and Hyperion run on a single Pi. The Power supply is a 10A 5V box that powers as well the LEDs as the RPi.

    Btw: in 90% of all cases the last LED shines green. But it also happened that it shines blue or lilac.

    Looking at this thread's feedback, it doesn't look as if many other users have the same problem :).
     
  6. Brindosch

    Brindosch Administrator Administrator

    Messages:
    592
    Hardware:
    RPi1/Zero, RPi2, RPi3, +nodeMCU/ESP8266
    A small statement: Yes there was a change, to reduce cpu load and stop unnecessary output the led device no longer outputs data if there is no new data if you use smoothing. If your Hyperion is at "idle" (-> no new data to process) no output is created. So there is currently no difference between a Hyperion in "idle" mode, a stopped Hyperion process or a Pi that is shutdown. There is always a weird effect if you don't unplug Pi and led power at the same time.

    ping @redPanther
     
  7. Doc.Ex

    Doc.Ex Member

    Messages:
    73
    Hardware:
    RPi2, +PhilipsHue
    My guess is that this behaviour is caused by electro magnetic interference. My first 2 LEDs also light up when Hyperion is off. Mostly when I switch off my AVR. In the moment of switching it off the relais release the voltage on the condensors, so there is an electro magnetic field around the avr for a short time. Since the LEDs are near the avr, the field might cause a false signal in controller chip of the LEDs and thus the LEDs light up. Because there is no new signal from hyperion the LEDs hold the last signal which is why the LEDs keep lit. A greater distance between the LEDs and for example avrs and shielded cables to the LEDs could help. This at least is my theory, didn't test it.
     
  8. Pryxus

    Pryxus New Member

    Messages:
    8
    Hardware:
    RPi3
    [QUOTE="Doc.Ex, post: 2073, member: 89"this behaviour is caused by electro magnetic interference.[/QUOTE]
    Wow, that's a really goof hint and a reason I would never have thought of.

    But it seems you're right. When running and stopping my receiver, after the fourth or fifth time, the LED starts to glow. Right in corellation to a certain receiver action.
    Unfortunately, I guess this is the hardest scenario to fix the problem.

    BTW, I have a Pioneer VSX 827 Receiver. Maybe there are better and worse receivers out there!?
     
  9. redPanther

    redPanther Moderator Developer

    Messages:
    197
    Hardware:
    RPi1/Zero, RPi2, 32/64bit, +Arduino
    @Pryxus
    did you connect ground and power on both ends to the stripe? If not, do so.
    Connecting only one end of the stripe often causes various problems.

    also shielded data cable (e.g. network cabel) can help
     
  10. Doc.Ex

    Doc.Ex Member

    Messages:
    73
    Hardware:
    RPi2, +PhilipsHue
    It doesn't matter what brand or quality your receiver is. As redPanther said, the only way to solve that is to use shielded data cables or increase the distance of the data cables from the avr and other unshielded cables.