IOT light dimmer using Arduino and Nodemcu esp8266 wifi module

(Last Updated On: February 13, 2020)

iot light dimmer


IoT light dimmer- In this tutorial, you will learn how to control the brightness of a 110/220v Ac light Bulb using Arduino, Nodemcu esp8266 wifi module, MOC3021, BTA16 Triac, Zero crossing detector and Blynk application. With the help of this project, the ac light bulb brightness can be controlled from anywhere around the world. This project is entirely based on my previous tutorial in which I used a potentiometer to control the brightness of the ac light bulb. So I highly recommend you should watch my previous tutorial as I will be using the same connections.

In this Tutorial, I will only explain the modifications.

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

Arduino Uno:
Mega 2560:
Nodemcu esp8266 wifi module: Best price
MOC3021 optoisolator Triac Driver:
BTA16 Triac:
EL817 optocoupler:
Bridge Rectifier:
lm7805 Voltage Regulator:
330-ohm resistors pack:
5v 2A adaptor:
2n2222 NPN transistors:
10k Resistor:
lm7805 Voltage Regulator:
330-ohm resistors pack:
female DC power jack socket:
470uf capacitors:
5×7 cm Vero board:
female headers:
connection wires:
Super Starter kit for Beginners:
Jumper Wires:
Bread Board:
12v Adaptor:
PCB plate:
Variable Supply:
Digital Multimeter:
Vero Board / stripboard:
Soldering iron kit: “best” You guys should definitely purchase this:
Solder wire:
Wire Stripper:
PCB small portable drill machine:


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!

IoT light dimmer Circuit Diagram:

In this project, I am using the same circuits and connections as explained in my previous tutorial.

The only modification that I made in this project is the addition of the regulated power supply based on the lm7805 voltage regulator and Nodemcu esp8266 wifi module. The 5 volt regulated power supply will be used to power up the Nodemcu esp8266 wifi module.

For the circuits interfacing and Blynk application designing watch video Tutorial Click here”.

iot light dimmer Programming:

Arduino Programming:

Nodemcu esp8266 wifi module programming:

Watch Video 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