No offence, but why do you bother him with schematics for serial converter boards and soldering this and that, when you can get a decent usb to serial converter board (PL2303) from Asia for about 3,-USD shipped?
It takes some time to get to your location, that's for sure, but the quality is good and it works perfectly.
It takes some time to get to your location, that's for sure, but the quality is good and it works perfectly.