Power supply for Nodemcu esp8266 wifi module

(Last Updated On: June 26, 2020)

power supply for nodemcu

Power Supply for Nodemcu Description:

In this tutorial, you will learn how to make your own power supply for Nodemcu esp8266 wifi module so that it can be easily powered up using a 12v adaptor or a  solar panel or aaa   12v battery or any other dc voltage source.

The input source voltage should be greater than 5 volts as we are using a 7805 voltage regulator and less than 35 volts. In this tutorial, you will also learn how to add female headers so that it can be easily interfaced with Arduino Uno or other electronic circuits.

A very common mistake that people often make is that they power the Nodemcu esp8266 wifi module using the Arduino’s 5v. As Arduino’s cannot provide enough current due to which the Nodemcu module keeps resetting.  For the Detailed explanation watch video tutorial.

The components and tools used in this project can be purchased from Amazon, the components Purchase links are given below:

Nodemcu esp8266 wifi module: Best price: 

lm7805 Voltage Regulator: 

female DC power jack socket:

470uf capacitors: 

5×7 cm Vero board: 

*Please Note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

Nodemcu Power Supply Circuit Diagram:

power supply for nodemcu

The circuit Diagram is really simple as you can see. J1 is the female dc socket where you can connect a 12v adaptor or a 12v battery or a 9v battery. The power supply as you can see is based on the LM7805 voltage regulator. Two 470uf capacitors are connected at the input and output of the voltage regulator. A 330-ohm resistor is connected in series with the 2.5v led. This is a current limiting resistor. to power, up the Nodemcu module, we simply connect the output of the voltage regulator with the Vin pin of the Nodemcu module and connect the ground with the ground pin of the Nodemcu module. For more detailed explanation watch video Tutorial.

Watch Video Tutorial:

Updated Tutorial:


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About the Author: Engr Fahad

My name is Shahzada Fahad and I am an Electrical Engineer. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. My Hobbies are * Watching Movies * Music * Martial Arts * Photography * Travelling * Make Sketches and so on...

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