Hi!
Cannot seem to get this going right.
Individually the led strips work, but when I Connect them together as the attached picture I get a lot of flickering on Lights 2.
Is something wrong here?
All grounds splice together and put fuses on each power supply.
@srg74 the GND froim the upper trafo needs to put together with the Trafo on the lower sketch
AND use a FUSE like the one in the Car system you can get it almost on every Fuel supply station
to shield the system
use at least 60-100ohm on the esp32 to the DATA pins to avoid backpower
You will lose the fist and the last LED in stripe if you go direct from pin to Data
As per @srg74,
Common ground for all supplies and strips.
Fuses for power.
Don’t worry about resistors until you’ve solved your power issues.
what do you mean direct from pin to data?
Read here. A resistor goes between 16 and the led strip and between 18 and the led strip. However, it’s not clear how long your wires are, why you are using 2 transformers, or how many LEDs you are using, so like @divsys said, don’t worry about that until you have common GND and fuses.
the 2 strips are around 11m long. so i need a separate power supply for each.
do i just run the esp on one power supply then connect the power supply to one strip, then the esp data to both DI and then also join the grounds?
Are the LEDs a uniform brightness? Do any flicker? Where? 11m each, or total? If total, are they the same length? How many LEDs total? Which type of LEDs? Power supply wattage?
2x Ws2812b 11m long, 1056 leds. 24v
No flicker or issues if i use 1powr supply and 1 esp. But i want to use 2 power supplies one on each strip and controlled by one esp. I cant use daisy chain as they both start and end the same spot
I’m confused. WS2812b take 5V. How are you stepping down the voltage?
WS2811, but thats not the issue.
if your initial drawing is still valid, read the very first answer again or provide updated drawing. you are missing a ground so data signal flaps in the breeze.
What @dedehai said… Connect the two grounds and leave the rest as is, according to your drawing.
Yes. then both power supplies have the same potential. In your original sketch, only light 1 works.
Turn both strips to 100% white. If the color changes or dims towards the end, you will need to inject power at, or towards the end. Injecting simply means adding + and - connections (don’t connect the pluses from the power supplies together!) to the LED strips to overcome the cumulative voltage drop.
