Arduino & Atmel?

hmm i just wonder can i replace my Intel 8051/Atmel 89s52 with arduino? and hmm i would like to ask schematic for it =)

can i replace my Intel 8051/Atmel 89s52 with arduino?

That would depend entirely on what the Intel 8051/Atmel 89s52 is doing for you.

i would like to ask schematic for it

So, ask. When you do, please be sure to describe what "it" is.

a little school project which using intel 8051/ At89s52, RTC and Lcd screen to create a rtc based digital calender =), schematic of Arduino which... you recommended

All the Arduino schematics are published here:

Any of them would be suitable for what you want to do.