I only have one max232.
Yes, max232 inverts ttl signal to serial for pc.
I need this part because on my pcb I only have AVR ISP for programming and I dont know what is goin' on with my code.
So I solder two wires (RX - TX) directly from my serial max232 to ttl converter to atmega. This is some kind of low cost debuging.
This is my first complex project in arduino.
I will draw block schematic and post it what exactly am I doing.