I am trying to run 72 Neopixels at half brightness on a D1 mini clone and have so far today managed to blow 2 of them. I don't have a schematic to show but I will describe it the best I can.
I have a standard USB socket wired to the 5v and Gnd on the D1 to power it with a 5v 2.1A usb plug I have. I also have the same 5v and gnd wires with a 1000uf 6.3v cap going to a 3 pin connector for the pixels. There is a 470 ohm resistor from the D4 pin, on the d1 mini, to the pixel connector as well.
I have WLED 0.12.0 installed with NodeMCU PyFasher.
Both D1s have been wired exactly the same way.
The first d1 I used was working fine with the WLED app for about half an hour or so, then I turned the lights off and left them plugged in. After another half hour ish the first 2 pixels lit up on their own. I tried to connect WLED to test the strip but it said my lights were offline. I unplugged the strip and plugged back in again, still the first 2 pixels were lit and there was no signal. On the d1, top right just above the CH340 chip pin 1 there is a tiny black component, (not sure what it is) that was now covered in something white. With power connected, that part glows orange.
++++++++++ R.I.P D1 Mini No 1 ++++++++++
The second d1 I tried worked for about 2 minutes then lost contact. Now WLED will find the d1 and apparently connect, but the d1 power light fails to light, (it does work, I tested it with the blink sketch) and there is no output to the pixels.
++++++++++ R.I.P D1 Mini No 2 ++++++++++
I am making a gift for my friends 12 year old daughters birthday and I have 5 days to finish it. I have 1 d1 left and I really don't want to blow this one. Can anyone PLEASE offer any solution or info or links that will help me fix this. I can't upset my friends kid, and she is expecting it.
Thanks in advance to everyone that views or replies to this post.