OK, I need some help here. I have a ESP32 controller connected to a WS2812B 300 count LED strip and I can only get the first 75 LEDs to light up. When I set the LED Count to 76 or higher, then nothing lights up. I’m kind of new to the Arduino world so maybe I missed something. I have the Adafruit Ne…

So I'm looking online for solutions and I see another library called FastLED that gets used a lot. Does anyone know the difference between Adafruit_NeoPixel and FastLED. I might try switching it when I get some time, but it would be nice to understand it better.

The constructor calls updateLength() (in spite of the comment for updateLength()) which sets the pixel count to 0 if the malloc() fails. /*! @brief Change the length of a previously-declared Adafruit_NeoPixel strip object. Old data is deallocated and new data is cleared. P…

SO your first post says 75 light up, your 10th post says none light up. Guess there's a problem, all right.

[image] DVDdoug: If the 1st LED works, that's not causing a problem Generally yes, however we should strive for teaching proper design in projects. Something borderline might work today but not tomorrow. Leaving potential problems in a design is never recommended. Leaving poor coding i…

[image] texas-gary: So I thought it might be a physical problem as well, but I don't see any damage to the LED strip. That doesn't mean there is no problem. You didn't answer to my question about different start address. If you believe the code is your problem, keep it at 75 and instead atta…

Did you try a different strip ? :thinking: Replace the 75 and then 76 Pixels. [image] Share tips you have come across General Electronics Replacing a Bad Pixel on a Neo Pixel Strip Lately I have had to replace some bad pixels on some malfunctioning Ne…

Try setup() { uint16_t count=strip.numPixels() to see how many pixels the object thinks it has. If the result is zero the storage allocation failed, a code problem. If not zero and it matches what you think you have it is probably a wiring error.

OK. This is the only ESP32 microcontroller I have and also the only LED strip. They aren't mine, so I'm reluctant to cut it up. I'm working on a project for someone else, but it's mostly just a proof of concept. I got the project to work, but for my own knowledge, I want to know why I can't go beyon…

[image] oldcurmudgeon: see how many pixels the object thinks it has. How does it tell me the answer to this? I don't have the serial display connected. I have one, but that is something new that I haven't messed with yet.

[image] texas-gary: I want to know why I can't go beyond 75 LEDs. Suggest you (or someone else ;) ) has damaged either pixel 75 or 76. :sob:

WS2812B LED strip won't light past 75

Other Hardware LEDs and Multiplexing

LarryD August 17, 2024, 6:42pm 17

Did you try a different strip ?
Replace the 75 and then 76 Pixels.

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WS2812B LED strip won't light past 75

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