Arduino Uno I have but unfortunately I'm damaged my atmega328P PU dip chip, so can I use any alternative chip because its too costly here can you suggest any alternative chips
I doubt you're going to find a compatible alternative. With the chip shortage it's probably cheaper to buy another Uno.
No. There is no alternative. Either you have to buy an ATmega328P with Arduino bootloader or you have to buy a blank ATmega328P and bootload it with another Arduino.
And if you ever consider making an Arduino or any other PCB by yourself, this one may help you: Basics of PCB Designing for Beginners - PCB Tracks
Here is the list of alternative chips:
- ATmega328
- ATmega168
- ATmega8
- ATmega88
- ATmega48
You can use any of the A, P, or PA variants of these chips.
Since they are all pin compatible, any of these can be plugged into the DIP style Uno boards.
The ATmega88 and ATmega48 will require the use of a 3rd party boards platform. I recommend the excellent MiniCore:
Even though the official "Arduino AVR Boards" platform does provide support for the ATmega168 and ATmega8 chips, it is based on older boards that used an obsolete bootloader. So I would even recommend using MiniCore for the ATmega168 and ATmega8.
As mentioned, you will need an ISP programmer to burn the bootloader to any of those chips in order to do uploads as usual vial the USB cable of the Uno. You can use a spare Arduino board as an "Arduino as ISP" programmer if you don't have access to a dedicated ISP programmer.
You should be warned that there is no guarantee that the damage was limited to the ATmega328P chip on the board. The other components on the board are more difficult to replace.
Not knowing your skill set, or resources then considering the cost and availability of the parts plus adding a boot loader I would suggest you simply purchase another Arduino. Some of the online suppliers offer them for less than five bucks.