I try to power a WS8211 based ledstrip. I first achieved to make it work with an Arduino UNO.
The ledstrip needs to be fed with 12V power.
Once I apply power every 2 or 3 meters, everything works great !
I need to make it work with a Node MCU board with the ESP8266 wifi onboard. The main issue here is that this board use 3.3V logic. And because the ledstrip only understand 5v logic, I need to shift that. So I'm using a levelshifter I found on amazon here if you need details.
The problem is that the ledstrip is flickering and does not light up all the leds. Since it worked perfectly on the Arduino, I am pretty sure the logic level sent to the ledstrip isn't powerful enough (even though I'm using a level shifter).
Since I'm pretty new to electronics, I am not very sure if I did a correct wiring with the level shifter, the common ground and so on...
Here are some notes : I tried to measure the voltage on the levelshifter with a voltemeter. I put the red cable of the voltmeter on the signal pin and the black cable on the ground pin : In the code I put the selected pin on OUTPUT mode and HIGH.
In the lower column voltage I barely get 3V. In the higher column voltage I barely get 4V.
Again, because I'm a newbie I don't if I made correct measurements.
Any suggestion is welcomed ! :-)