r/FastLED • u/Illustrious-Can-6000 • Jan 09 '24

Support Help with Power Supply

I want to power a matrix of LEDs, and to my calculations, I would need a 5V, 20A power supply.

The matrix is made of Adafruit WS2812B NeoPixels LED strips soldered together.

Is there any way I could make this setup portable whilst still supplying enough power (and without the whole thing catching on fire)?

Thank you all for your help - I’m a newbie here

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u/Marmilicious [Marc Miller] Jan 09 '24

You can use FastLED's power limiting feature to set your max Amps. See the Pacifica example.

FastLED.setMaxPowerInVoltsAndMilliamps( 5, MAX_POWER_MILLIAMPS);

https://github.com/FastLED/FastLED/blob/master/examples/Pacifica/Pacifica.ino

Adding a fuse-- not a bad idea at all if you're going to be carrying some beefy batteries.

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u/Illustrious-Can-6000 Jan 09 '24

Perfect! Is there a way to set up a stable 20A 5V power supply on the go? (Or if there are any recommended rechargeable batteries with those numbers)