WLED with FCOB RGBIC LED STRIP WS2812b

Hi,
I replaced a 5 meter WS2812b LED strip with 30 leds/meter with a FCOB RGBIC LED STRIP ws2812b with 720 leds/meter and it doesn’t work.

my equipment is:

With the WS2812b 5-meter LED strip with 30 led/meter everything works.
Did I forget to do something?

Thanks

You will likely need a levelshifter.

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I 2nd this^^

Thanks for your answer, I’ll try it with a level shifter.

One further note, how are you powering the ESP?
If you’re using a separate 5V supply (or USB), remember to connect a ground line from the ESP to the LEDs so you have common ground for data (independent of power).

This is in addition to the proper levelshifter (don’t try and use I2C type), 74AHCTxxx based devices are best practice.

Ok, I’m a novice, do you have a wiring diagram? Thanks for your help

https://kno.wled.ge/basics/compatible-hardware/#levelshifters

scroll down a tiny bit.

Thank you, is this schematic correct? The schematic you linked to me has all the ports connected, is this necessary?

Thanks again for your help, thanks to you I hope to realize my project. 13 meters of FCOB 24v LEDs in aluminum profiles diffuser.

That image is correct for how to connect an input/output, however it it lacking what you should do with the unused channels.

This would be the correct wiring for only using 1 channel of the shifter:


This shows using 2 channels:

  • I would put that 100nF (.1uF) ceramic bypass capacitor up at the top close to vcc. It also makes it easy to connect to ground (1OE)

Example:

*don’t worry about the resistor. It is likely unneeded. If you are running 3 conductor wire with +,-,d in one and are running at longer distances and have white flickers now n there I would try adding a 33Ω resistor.

Is it absolutely necessary to connect all the channels? Is it absolutely necessary to connect the capacitor?
sorry for these questions, I want to make sure I’m doing the right thing.

I’ve made a diagram of the installation I want to make, is it correct?

You’re very close, but you still need:

  • 100nF capacitor from pin14 to ground (place close to pin 14).
  • Tie pins 9,10,12,13 to ground or Vcc.

The capacitor prevents switching noise from adding flicker to the data.
If the extra pins are left “floating” they can cause also flicker in your LED data (you can ignore 8,11).

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Like this?

Are these capacitors any good?

Thank you.

That wiring will work and either of those capacitors should be fine.

Thank you very much for your answers and your time. I will be testing this weekend and will get back to you. :grinning:

Hello, I have received the capacitors, is there a wiring direction?

No, those types of capacitors can go either way, they’re not polarized.

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Good evening, just a question about my last diagram.

Is the ground of the LEDs connected to ESP32 not a problem since the positive of the LEDs is connected to the 24V of the power supply?

Thanks

Connecting the ground lines together is not a problem (in fact it’s required).
Often the best way to do that for the data connection is to run a smaller data and ground wire together directly from the ESP to the strip, independent of the power wires that run to the power supply to the strip.