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LED WS2815 ESP32-S3 drive
Posted: Tue Nov 21, 2023 2:47 am
by hardware_engineer
Hello, I wanted to drive two LED strips of WS2815 (each around 36 to 40pcs). I wanted to know if I can wire directly the GPIO output of the ESP32-S3 to the data input of the LED strips?
Re: LED WS2815 ESP32-S3 drive
Posted: Wed Nov 22, 2023 6:18 pm
by MicroController
I wanted to know if I can wire directly the GPIO output of the ESP32-S3 to the data input of the [WS2815]
Given that the WS2815 require >= 9.5V VDD, and their logic high input is >= 0.7VDD, that's pretty much a "no".
Re: LED WS2815 ESP32-S3 drive
Posted: Thu Nov 23, 2023 3:04 am
by ESP_Sprite
Turns out the datasheet is confusing, see e.g.
here; the data streams use 5V logic levels. Still 0.7*5V=3.7V, so you need a 5V level shifter to drive the data signal for the LEDs.
Re: LED WS2815 ESP32-S3 drive
Posted: Thu Nov 23, 2023 10:07 pm
by MicroController
ESP_Sprite wrote: ↑Thu Nov 23, 2023 3:04 am
Turns out the datasheet is confusing
Oh boy, they got me
Thanks for clarifying.
Re: LED WS2815 ESP32-S3 drive
Posted: Fri Nov 24, 2023 2:30 am
by ESP_Sprite
MicroController wrote: ↑Thu Nov 23, 2023 10:07 pm
Oh boy, they got me
Thanks for clarifying.
Can't blame ya, honestly. I happened to go 'that can't be right' and Google around a bit and hit the link I posted, otherwise I'd come to the same conclusion as you. That datasheet is simply written wrong imo.