There is no "VIN" pin on my NodeMCU 32S so I used that pin. Within minutes it became non-responsive. I thought it had a voltage regulator, but maybe I'm seeing things, wouldn't be the first time. I cant even get Blink to work.
Yes.
Maybe just the regulator is fried.
I can understand why someone might be tempted to put 5V on a pin marked 5V ...............
If it is this one (schematic) : https://www.smart-prototyping.com/image/data/2_components/development_board/101839%20NodMCU-32S/1.png
that is with an AMS1117 3.3 volt regulator and you used the pin marked marked VDD5V then there should be no problem with applying 6.5 volts to it.
I see a VR on it. Not sure the part no. According to Zerynth | Documentation I am not putting in enough voltage. It recomends 7-12V!
F&ck. I just bricked a brand new ESP32. This project destroys boards. I;m gonna set it ablaze. I had logic level shifters and was powering it at 5.3V. It's not the Chip but the Dev Board so it can take more. No idea what happened.
It was this product: https://smile.amazon.com/gp/product/B07F877YZQ/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
Reckon you fried the serial interface chip, which is probably only rated to 5v (it may also have survived, but shut down your USB port because when you plugged it in, it connected the power rail of USB port to a voltage other higher than 5v).
Don't put voltages other than 5v on a pin labeled 5v.
Best way to power things with a USB port for power is via a USB cable into that port, physically preventing you from connecting two power sources at the same time.
I actually fried that voltage regulator. There must be a short in my project, it's a mess, but I can't find any continuity between pins that were connected. It was an ESP8266 this time, Vin was first 5V, it didn't turn on. Then i changed, impatient am i, to a 16V supply. The VR popped in a spectacular fashion, although the board actually did work for a moment. I could tell by LED flashing. I assume something between the two would of worked. I am suspicious of the LLCs, they were the only thing I had connected to + rail, and the VR blew. What do you think is going on overall?