Hi am jeddy i would like to ask about micro-controller pwm based light dimmer circuit

Ever wondered about how exciting the use of an Arduino board can be in your daily life? We present to you a very basic and a wonderful experiment. We often adjust the display brightness of our mobile phones to suit to our need. Haven’t you felt the same need for your bedside lamps or any other lighting at home? Here we are going to teach you how to make an Arduino lamp dimmer. Using this project, you can control the brightness of your table lamp according to your need. And start building one of the best arduino projects.

What are the stuff required to do this?

Arduino
Resistors: 330ohm(1No.s), 33k(2no.s), 22k(1No.s), 220ohm(1No.s)
Optocoupler: 4N35(1No.s)
Diode: 1N4508(4No.s), 1N4007(1No.s), Zener 10V.4W(1No.s)
Capacitor 2.2uF/63V(1No.s), 220nF/275V(1No.s)
MOSFET: IRF830A
Lamp: 100W
230V Supply
Socket
Solder dot board and Soldering kit
How does it work?

In this project, we are going to adjust the brightness of the lamp connected to the circuit by serial port. The brightness can be changed according to the commands we are providing to the serial port. We will be using these particular commands in this arduino project :

‘0’ to TURN OFF.
‘1’ for 25% brightness.
‘2’ for 50% brightness.
‘3’ for 75% brightness.
‘4’ for 100% brightness.
We will design a Pulse Wave Modulated (PWM) dimmer circuit which will use IRF830A in a diode bridge which is used to control the voltage across the bulb with pulse wave modulation (PWM). The power supply voltage for driving the gate is supplied by the voltage across the Metal Oxide Semiconductor Field-Effect Transistor (MOSFET).