I have a NodeMCU where I connected a LED strip (WS2812b, which operates at 5V).
NodeMCU is powered via USB 5V. The used power adapter can supply 2.5A max.
I don't have a separate power supply for the LED strip yet, so I connected it to VIN/GND of the NodeMCU.
Yesterday, I took the NodeMCU (without led strip) to my PC and uploaded an updated sketch. After that, back in the living room, I connected the NodeMCU with the led strip and the USB power supply. I didn't need an ambilight at the moment so I left it off. After 5 minutes, I smelled something burned. As you can see in the second image, the component below ground is burned.
I had this setup successful running for a week (with ambilight turned on for several hours) and had no issues at all.
Did I something fundamental wrong? Any guess, why it works flawless and then suddenly burned after just 5minutes?
Any tip/suggestion is very appreciated!
The white component on the right is a DHT22 temperature sensor and has been added for completeness.
The resistor and LED on the right are not used, they were just plugged in from a previous setup.