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consumption of a neopixel
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consumption of a neopixel

by jeanpaul1025 on Sat Jan 06, 2018 12:24 pm

Hi,

I'm trying to do my first projet and i will use some "5050 RGB LED with Integrated Drivers".
I will have :
- 3 jewels (7 LED each)
- 1 ring (12 LED each)
- 2 sticks (8 LED each)

As it is said it need ~18mA per LED
I have 49 so I approximately need 882mA

So do you think that with one power supply of 5v 1A, that would be enough for all of theses?

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Re: consumption of a neopixel

by adafruit_support_bill on Sat Jan 06, 2018 1:34 pm

Code: Select all | TOGGLE FULL SIZE
- 3 jewels (7 LED each)
- 1 ring (12 LED each)
- 2 sticks (8 LED each)

As it is said it need ~18mA per LED
I have 49 so I approximately need 882mA

There are 3 LEDs (red, green and blue) per neopixel, so you need to multiply that all by 3.

Of course that is the 'worst-case' estmate with all pixels at full intensity white. Most applications require substantially less.
https://learn.adafruit.com/sipping-power-with-neopixels

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Re: consumption of a neopixel

by jeanpaul1025 on Sat Jan 06, 2018 7:12 pm

Hi,
thanks a lot.

And for the power supply of all the led.
I think I should do a branch circuit to have the same voltage (5V) in each branch (mean in each ring, stick or jewel) to have a low intensity in each branch? Am I right?

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Re: consumption of a neopixel

by adafruit_support_bill on Sat Jan 06, 2018 7:16 pm

With just 49 pixels it is probably not a huge issue. But it never hurts to have multiple power feeds to minimize the voltage drop.

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Re: consumption of a neopixel

by jeanpaul1025 on Sat Jan 06, 2018 7:22 pm

but what type of circuit should i choose? a branch or a series one?

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Re: consumption of a neopixel

by adafruit_support_bill on Sun Jan 07, 2018 11:19 am

You cannot wire them in series. They all need the same ground reference for the signal. Just run +5 and GND to several points in your string as shown in the guide. https://learn.adafruit.com/adafruit-neo ... ting-power

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