WS2812b - Atmel 32U4 - First LED White USB Powered

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ok guys, i'm sure knows how me.

i'm trying build led ring cornhole set , i'm having bit of trouble.

i'm using atmel 32u4 clone running @ measured 4.6v off usb port on pc. have 4 2812b leds in string. have data pin pin 6, 5v right off usb connector. using neopixel library.

when program micro leds work perfectly. bow were. after board programmed , unplug , plug in first led white , other 3 off. have verified program still running via printscreen.

trouble shooting:

- tried 220ohm , 470ohm resistor on data pin
- used diode on input power.
- lowered brightness setting.
- added 1sec delay startup.

i same results every time.

for fun of pulled out due had laying around , runs string perfectly. though noticed due seems have boost converter in gets 5v above 5v not under it. can power cycle want , no problem.

i've read leds should work @ 4.6v volts.

have tried running off different pin ?
so, after first white led, run expected ? example pin flashing led on it

can post code please


Arduino Forum > Using Arduino > LEDs and Multiplexing > WS2812b - Atmel 32U4 - First LED White USB Powered


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