Hi, i want to setup a ESP32 with a 3-Pin 5V LED Strip. Latest WLED installed. Full LED strip only works when connected to PC USB-A port with micro USB to ESP32. When i try a different solution, LEDs turn not on, ESP32 freezes, sometimes only first LEDs work for some secondes with a effect. Tried: 3 different 5V USB-A power supplies with micro USB 5V from ATX power supply to 5V pin 3.3V from ATX power supply to 3.3V pin 5V 2.4A power supply to 5V pin LEDs always connected to 5V ATX power supply. When LED strip is not connected, ESP32 can be configured and works. Can you please help?

Please post an annotated schematic showing how everything is wired. Before doing that, ensure all grounds are properly connected. Keep in mind that you may have a potential ground connection to your external power supply through your PC.

Like @gilshultz says, a schematic please [image] How to make a schematic you can post. Introductory Tutorials When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th… and your code

Problem solved: Don't user jumper cables! Plugged the ESP 5V Pin directly to the ATX power supply cable and now it works! So easy. And I spent so much time on it yesterday ...

[image] cert: ESP 5V Pin directly to the ATX From where does the WS2812 receive power? ATX power supply. Do you have a 1000uF electrolytic capacitor across VCC and GND of the WS2812? Do you have a 470 ohm resistor from the ESP data pin to the WS2812?

You will want to add these two components, for longer life of the data pin and WS2812.

Thank you for your info. I will add them.

Here is a drawing, if my description was not clear (the color one with the capacitor image) [ws2812_power_injection]

ESP32 with LED strip, only works when connected to PC USB

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johnerrington October 24, 2024, 7:13am 3

Like @gilshultz says, a schematic please

and your code

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ESP32 with LED strip, only works when connected to PC USB

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