How can I power a NodeMCU12E ?

Other Hardware General Electronics
1

Can I safely power a ESP8266 NodeMCU12E using a mobile charger ?

2

Yes.. to Vin pin

3

Powering the board through USB port is OK.

4

the mobile charger is 5V but NodeMcu 12E is 3.3V . can i use the mobile charger?

5

Yes, the board has a 3.3V voltage regulator.

6

thank you

7

AFAIK most mobile chargers have circuitry that turns them off after a while when current draw is too low.
Don't know if the ~80mA current draw of a NodeMcu is enough to keep the charger going.
Leo..

8

Wawa:
AFAIK most mobile chargers have circuitry that turns them off after a while when current draw is too low.
Don't know if the ~80mA current draw of a NodeMcu is enough to keep the charger going.
Leo..

The plug-in types? I've only seen that kind of behavior on USB power-banks.

The plug-in types (wall wart) uses cycle skipping to to almost to zero power consumption. There is still 5V on the output though.

// Per.