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SOLVED WS2812b Full White Flicker UNO r3 274 led count

Discussion in 'Hardware Support' started by matthew henry, 10 January 2019 at 19:13.

  1. matthew henry

    matthew henry New Member

    Messages:
    12
    Hardware:
    RPi3
    65" Spectre tv
    300 LED count but only using 274 (this has been modified in the led count on the sketch)
    5v 20 amps powered on both sides of the LED strip (5m Uncut)
    Arduino UNO r3 pin 6 for data and ground pin also used. Connected to RPI 3 VIA usb cable (baudrate set to 500000)
    RPI 3 connected to 5v with HDMI to USB capture card (decent...) (baudrate set to 500000) (OpenElec 7.0.1)
    eczoo 4k splitter coming from Shield tv


    Everything is working probably but my only issue is at full MAX brightness (all white) I get flickers going around everywhere. It can be pretty annoying.

    I thought a level shifter would be the key but it seems that the IO pins on the Arduino UNO are already 5V, So I dont think this would help. But I do have a level shifter if anyone has a suggestion.

    It could be my power supply, Its rated for 20 amps..... I ordered a 30amp which will be here Saturday just in case. Based On calculations it shouldnt be there in my opinon. Does anyone have any other suggestions?
     
  2. TPmodding

    TPmodding Administrator Staff Member Administrator

    Messages:
    983
    Hardware:
    RPi1/Zero, RPi2, RPi3, +Arduino, +nodeMCU/ESP8266
    i would recommend to supply power after every 100led and not only at start and end of the stripe
     
  3. matthew henry

    matthew henry New Member

    Messages:
    12
    Hardware:
    RPi3
    I went ahead and added 5v and ground wire to my corners that weren't being powered. I am still getting flickering unfortunately.

    Ill get the new power supply today but im wondering if the issue is the arduino.
     
  4. matthew henry

    matthew henry New Member

    Messages:
    12
    Hardware:
    RPi3
    NEW power supply came in. I was running everything from 1 positive post and 1 negative post on the Switching power supply. I changed this to use both of the positive and negative posts and I upgraded the wiring to 18 gauge speaker wire.

    Unfortunately the "30 amp" power supply I purchased made the flicker much much worse.

    Fortunately once I plugged my other power supply in with the new connections the flicker is gone.