Greetings all, I'm working with a strip of some WS2812B (120 LEDs) and have them connected to a benchtop power supply. I'm doing some simple animations and messing around with the FastLED library and have a question about current draw I'm hoping someone can help me understand.
I have a breadboard pot that controls brightness and when I have my strip set to all white, full brightness, at 5.0v the power supply (in constant voltage mode) is only showing 2.57 amps. Shouldn't this be closer to 7.2 amps? 120 LEDs * 60 mA = 7200 mA / 1000 = 7.2 amps.
I'm trying to figure out big a power supply I need once I disconnect it from the benchtop PSU and everything I've read seems to tell me that 60 WS2812Bs require 3.6 amps--which corresponds to my 7.2 amps for 120 LEDs yet the reading on the power supply is only 2.57 amps so I'm a bit confused.