We do lots of converting from TTL serial to USB (using the FTDI and Silicon Labs ICs). But what do you do if you’ve got a laptop and need TTL serial? This is a high quality, low cost, small, and easy to use USB to RS232 converter. Device uses the IC CP2102 and supports baud rates up to 1Mbps. Driver support for Windows, Mac, and Linux RedHat.
download the driver here