I have a 5 metre strand of WS2812B LEDs, at 18W per metre.
I also have a 120V to 5V-30A power supply I plan to connect them to. The data pin will be connected to (for now), a PWM pin on an Arduino Uno R3.
Now, I've found documentation that states:
Before connecting NeoPixels to any large power source (DC “wall wart” or even a large battery), add a capacitor (1000 µF, 6.3V or higher) across the + and – terminals
You can find that reference in Adafruit's Best Practices.
I don't have any 1000 µF caps. I do have a dozen 470 µF caps rated at 25V.
First question: Can I put two (or more) of these in parallel in order to get the same effect?
Second question: If I connect power to both ends (or even three locations) of the strip, can I run each feed from this single amalgamation of capacitors, or does each feed into the LED strip require its own?
Third question: Will it be safe to use just a single 470 µF cap in place of 1000 µF?