This is confusing me. I have read that Adafruit's neopixels (WS2812B) can draw up to 60mA per pixel (LED) when displaying white at full brightness. (20mA for each colour - RGB).
I am using ICStation's WS2812B LED ring which has 16 LEDs on the ring.
I am measuring the voltage drop on a 1.2ohm resistor in series with the 5V pin of the LED ring, while lighting up an increasing number of LEDs (white at full brightness).
Here are my results:
1 LED = 74 mV 2 LEDs = 120 mV 16 LEDs = 234 mV ??
I would have expected that the current draw (and voltage drop) would have been much higher than that reading when ALL leds are lit up ?? What am I doing wrong ?
I am powering the LED ring using an external 5V 4A power supply.