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Author Topic: 5A NeoPixel Color Calculator  (Read 424 times)

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Offline Kouri

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5A NeoPixel Color Calculator
« on: September 06, 2017, 06:47:51 AM »
I've heard a single color on a 2-strip NeoPixel blade can easily eat up 5-6A of current, and a full-blast white can trip the protection circuit on some cells.

I whipped up a quick calculator that (in theory) should give Plecter RGB values for mixed-colors that won't eat up any more power than a full-blast single color.

Still putting my first blade together, but I figured I'd share this now to get some feedback:

Low-Power Color Selector
« Last Edit: September 20, 2017, 03:43:45 AM by Kouri »

Offline erv

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Re: 6A NeoPixel Color Calculator
« Reply #1 on: September 06, 2017, 07:43:23 AM »
thank you for sharing !

Offline SA22C

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Re: 6A NeoPixel Color Calculator
« Reply #2 on: September 06, 2017, 10:38:54 AM »
Erv,

Are there any concerns for running the neopixel strips at lower drive values?  In your manual, you caution against running the standard in-hilt LEDS at values lower than 80%.

Thanks!

Offline erv

  • Plecter Labs Inc. "Keeper of the Buttered Toast"
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Re: 6A NeoPixel Color Calculator
« Reply #3 on: September 06, 2017, 11:16:43 PM »
no

Offline Obi_1

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Re: 6A NeoPixel Color Calculator
« Reply #4 on: September 07, 2017, 10:37:31 AM »
If you want to calculate current consumption, rely on facts instead of rumors:
https://github.com/Protonerd/DIYino/blob/master/Neopixels_Characterisation_report1.pdf

Offline Kouri

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Re: 6A NeoPixel Color Calculator
« Reply #5 on: September 20, 2017, 03:43:24 AM »
Just wrapped up my blade. 36" at 130 pixels long. Two SMD strips.

Going off the provided info, that's about 4.7-5A for a standard-length blade, assuming 260 LEDs at 18mA.

I'll get photo/video documentation, but so far, the calculator's working great. I'm getting some nice white flashes without having to throw the strip on full-blast.

Offline Kouri

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Re: 5A NeoPixel Color Calculator
« Reply #6 on: October 01, 2017, 02:38:31 PM »
Video demo:



Lime-Green and all FoC colors were made with the calculator. Red and Blue are default 1023. Each FoC is an off-white color meant to provide the most contrast to the main blade. Lime-Green vs Purple-White. Red vs Cool-White. Blue vs Warm-White.

Sarge Green: [241, 779, 0]
Sarge FoC: [340, 308, 374]

Vader Red: [1023, 0, 0]
Vader FoC: [260, 381, 381]

Luke Blue: [0, 0, 1023]
Luke FoC: [348, 389, 285]