connect atmega2560 communication RXx TXx to USB

I want to implement or connect one of the communication ports (Serial1, Serial2, or Serial3) to a USB port on my PC. my initial purpose is to use this as a debugging tool to get the traffic off the Serial0 port. I just got a atmega2560.

I thought I could just wire the communication pins RXx and TXx (x = 1, 2 or 3) to a USB jack. but when I connect it to my PC, the PC issues an error “detected power surge on USB device”, then is disables the device. I do not want to purchase a shield but rather DIY.

Any help, suggestions and directions are greatly appreciated. Thanks

I thought I could just wire the communication pins RXx and TXx (x = 1, 2 or 3) to a USB jack.

Bzzzzzt! Wishful thinking doesn't make things work. To connect to a USB port on your computer, you will an appropriate USB serial adapter.

Something like this can work for doing that:

http://www.ebay.com/itm/370532286388?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Lefty