so can you please give me a schematic that work good
so in my case i have chip (atmega 328 so what is the board that i should choose it on the IDE
The circuit in Reply #15 is not the best:
The RS232 chip does not show it's power and gnd pins, and is missing 0.1uF cap to ground for the power pin. 1K resistors on pins 2 & 3 are not needed.