Hi all,
I got a question about externally powering my NodeMCU V3. It has an onboard voltage regulator (3v3) which breaks out to 3 header pins. Now I want to power 3v3 from an external board. Can I supply 3v3 to all of those pins at the same time? (Basically connected in parallel).
Anyone has done this before or has this experience with NodeMCU V3?
I have supplied a link below:
Thanks a lot!
rmvansomeren:
I got a question about externally powering my NodeMCU V3. It has an onboard voltage regulator (3v3) which breaks out to 3 header pins.
So it does!
rmvansomeren:
Now I want to power 3v3 from an external board. Can I supply 3v3 to all of those pins at the same time? (Basically connected in parallel).
Why would you want to connect to more than one pin? 
Also, why would you want to use a NodeMCU if you are going to provide a separate 3.3 V supply? An ESP-12 and adapter board would do the same job, though you would have to use an adapter to program it.
Thanks for your reply!
Paul__B:
So it does!Why would you want to connect to more than one pin?
It makes my PCB layout easier. Else I would have to route the traces from 1 side to the board to the other one. Just for convenience.
An ESP-12 and adapter board would do the same job, though you would have to use an adapter to program it.
That is one of the main reasons.
The three pins are all connected together on the NodeMCU so feel free to use any of them to connect the various parts together.
Thanks a lot!