Hi guys ! I have two question the first one is I will building

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1

Hi guys ! I have two question the first one is I will building a project using 800 RGB LEDS ( WS2812B ) and i need in a full brightness every leds what should i used power suppy ?

the second one is can i used FastLed library and adafruit in the same sketch ?
like this

#include <FastLED.h>

#define NUM_LEDS 54
#define DATA_PIN 6

CRGB leds[NUM_LEDS];

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#ifndef PSTR
#define PSTR // Make Arduino Due happy
#endif

I will use adafruit for matrix and i will use fastled for animation with 24 bits color
because adafruit matrix only supports 16 bits . Thanks in advance for answeing my question sorry for wrong grammar :smiley: :smiley:

2

800 * 60 mA * 5 V = 240 W. Libraries are not compatible, both try to use the same resources of your Arduino at the same time.

3

800 LEDs will be around 60A at full power

4

And you want my lib instead of adafruit http://marc.merlins.org/perso/arduino/post_2018-04-23_FastLED_NeoMatrix-library.html
http://marc.merlins.org/perso/arduino/post_2018-04-23_FastLED_NeoMatrix-library.html

5

You can also do 24bit color with the adafruit lib using the color passthrough hack in the library

6

Add 25% to the power supply rating, so if you need 60a use at least a 75a supply(s)

7

Thanks guys you help me a lot , my project is displaying a Text and animation using RGB LED Strip with GSM module .

8

@Marc_MERLIN thank you bro , you’re blog is awesome :slight_smile: i have a question bro

FastLED_NeoMatrix *matrix = new FastLED_NeoMatrix(matrixleds, mw, mh, mw/8, 1,
NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +
NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG );

can you explain the 4th and 5th parameter , why you divide mw by 8 and what is the next one parameter

9

@jester_salivio this is the same syntax is neomatrix. Did you read https://github.com/marcmerlin/FastLED_NeoMatrix/blob/master/examples/MatrixGFXDemo/MatrixGFXDemo.ino#L62 or equivalent?
mw/8 is 24/8 =3 columns, followed by 1 for 1 row.

10

Couple of math corrections… 800*.061.25(margin) = 60amps and 60a5v =300watts… if you want margining on wattage look up 350watt which falls pretty close into the PC ATX line of supplies… :slight_smile:

11

@Marc_MERLIN thanks man