I want to know that how's Arduino circuit work, ans also it's operation and hardware components
(assuming you're asking about the Arduino UNO)
There's a component by component explanation here: https://www.theengineeringprojects.com/2018/06/introduction-to-arduino-uno.html
ranapratapsingh You could also visit https://www.arduino.cc/en/Guide if you are looking for something more basic. This is the official Arduino "Getting Started" page.
