I'm designing a PCB which is based on NodeMCU board in its core.
On NodeMCU there are some GND pins, most of them are to serve digital outputs/inputs, or external sensors which operate on 3.3V.
Vin pin on the NodeMCU can get higher voltage (5+) which goes through a voltage regulator into the rest of the board.
My question: When planning the connections to GND - should or shouldn't I bridge the different GND pins - between the 3.3V circuits and the 'outer' 5V input the comes before the voltage regulator?
Many thanks!