Power supply for Nodemcu esp8266 wifi module

(Last Updated On: February 13, 2020)

power supply for nodemcu


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 “Click Here

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

Arduino Uno: https://amzn.to/37oaksm

Mega 2560: https://amzn.to/2ze1kdu

Nodemcu esp8266 wifi module: Best price: https://amzn.to/2NAvmiB

lm7805 Voltage Regulator: https://amzn.to/2IZEl5x

330-ohm resistors pack: https://amzn.to/2NtlAeh

female DC power jack socket: https://amzn.to/2KEo1gt

470 uf capacitors: https://amzn.to/2xDCOzf

5×7 cm Vero board: https://amzn.to/2OHGbvn

female headers: https://amzn.to/2zqmtiJ

connection wires: https://amzn.to/2DpBuW7

Super Starter kit for Beginners: https://amzn.to/2KJvmKG

Jumper Wires: https://amzn.to/2KMoVXs

Bread Board: https://amzn.to/2MS4q8X

12v Adaptor:  https://amzn.to/2Ntr6h1

PCB plate: https://amzn.to/2IUwpCt

Variable Supply: https://amzn.to/2MT4Qfj

Digital Multimeter: https://amzn.to/2Nvft9i

Vero Board / stripboard: https://amzn.to/2MTf9jD

Soldering iron kit:  “best”  You guys should definitely purchase this: https://amzn.to/2zfoNuJ

Solder wire: https://amzn.to/2ufUMWf

Wire Stripper: https://amzn.to/2KOqxfU

wirecutter: https://amzn.to/2ucIq14

PCB small portable drill machine: https://amzn.to/2Nu62XF

*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!

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 “Click Here

Watch Video Tutorial:

Updated Tutorial:


Recommended For You

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...

Leave a Reply