#Neopixel 144px RGBW going nuts

1 messages · Page 1 of 1 (latest)

paper frost
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For the backstory see message in #help-with-projects . I have now resoldered the data - resistor - arduino connection, but now the last 1/4 of the pixels are a warm white colour?

wintry quail
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  1. Start with a shorter strip.
  2. Add a capacitor per the guide.
  3. Ensure your power supply can provide enough amps for the number of LEDs in your strip.
paper frost
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It’s been working perfectly fine with how I have it rn before tho? The power supply is the exact same, it worked with full length before, I had a capacitor once, but it worked without

wintry quail
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The capacitor is important. It protects the first LED from the inrush current of 100+ LEDs pulling power.

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Are you still using the ~2¼A power supply?

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The max wattage of the power supply does not matter. From the label, it looks like it can supply up to 2¼A at any voltage. So at 5V, it can supply 11.25W.

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For the RGBW LEDs

30 RGBW LEDs: 12 Watts (2.4 Amps at 5 Volts)

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So even 30 LEDs is stretching the limits of that power supply. Try 24.

paper frost
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Why would it work before tho??

wintry quail
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It could be that attempting to power all those LEDs with an undersized power supply has burned it.

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How long did it work for?

paper frost
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Well I put it on my shelve for maybe three months?

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But it worked the first 2 perfectly