Hello guys, first of all sorry if I'm not writing in the correct subforum. I wasn't sure about write here or in the Nano subforum, but the main doubt I have is about a WS2812B so I thought this is the best subforum for it.
This first project worked well, no problem and no power supply required. Now I want to repeat this project but connecting this too:
-1 WS2812B 8x8 RGB
I've searched in this and other forums but still i'm not sure: Do I need a power supply? I read some topics that said yes because of the WS2812B, but I saw videos too where an Arduino could give enough power. I'm very newbie about Arduino, maybe this could be an easy question for you but not for me :'(. The parts won't arrive until Febraury or March, but I wouldn't like to wait that time and then have to wait other 1-2 months because I forgot something.
If the answer is yes... I have this power supply at home. Is it ok for it?
-5V 2A
Do I need a power supply? ... If the answer is yes... I have this power supply at home. Is it ok for it? ... 5V 2A
You will need a separate power supply. The Arduino can provide some power but there are limits. There are multiple parameters e.g.
How much does the Arduino need for itself and other components e.g. sensors?
What is the rated current the power converter can supply? (see datasheet)
How much heat is created during the conversion in the converter? (depends on input voltage and current)
How much heat can the PCB transfer from the devices? (depends on layout, temperature, heat-sink, ...)
How long will the maximum current flow?
As you can see just because the datasheet of a device says you get e.g. 1A from a power converter, does not mean you can get it continuously or at all.
Regarding your power supply. With 2A / (8x8x3) you get around 10mA per single LED (30mA per RGB). This looks too low. These LEDs are quite bright. A quick Google suggest you need around 50mA per RGB LED at full brightness. 64 x 50mA is 3.2A. So, I would go for a power supply that has at least 3.5A at 5V.