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jgarff / rpi_ws281x

Userspace Raspberry Pi PWM library for WS281X LEDs
BSD 2-Clause "Simplified" License
1.78k stars 622 forks source link

Raspi Model 3 #488

Open DaviZ82 opened 2 years ago

DaviZ82 commented 2 years ago

I am currently trying to get this Code running on my Raspi, but I cannot get a PWM Signal high enough, to turn on the LEDs. I meassured the output I get from several PWM Pins or SPI Pins. They are always anywhere close to 50mV. Is this what they are supposted to do? I am trying this Library with WS2815 Model LEDs, which should not do quite the Difference.

tenacioustechie commented 2 years ago

not sure if this is your issue, but you need a level shifter to run the pixels on a raspberry pi, they expect 5v signal, and 3.3v is not enough for some strips. See this for wiring examples: https://learn.adafruit.com/neopixels-on-raspberry-pi/raspberry-pi-wiring