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Thread: neopixel nbv4 speaker whine

  1. #1
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    Default neopixel nbv4 speaker whine

    i finally fully assembled my saber!!! its turned out great...but

    on my green program especially you can hear a certain whine to the sound

    https://imgur.com/gallery/M3Atydr

    i have clash set to 1023,1023,1023 or "white" and the clash sounds start to crackle and static after about 1/3 discharge

    without the blade everything sounds great, i've tried reformatting the SD card

    its my first build, so i had my share of troubles along the way...could it be the amp?

    am i expecting too much from the battery? or should i rewire it?

  2. #2

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    Which battery are you using, and what resistors do you have on your LEDs? Also is the battery fully charged?
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  3. #3
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    Default

    Panasonic Li-Ion 18650 3.7V 10A 3200mAh PCB Protected Rechargeable Battery

    330 ohm SMD 0603 resistor in the blade

    20mA DynaOhm™ Variable Resistor on the switch LED

    When green, I hear the faint whine, even on a full charge.

    it does get worse as the battery discharges

  4. #4

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    What wire gauge are you using, particularly for power to board and strips? On my first neopixel build I had a similar issue but it was because of the wires being too thin, I changed out to 26 awg and it worked perfectly.

  5. #5
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    26awg here also

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