Paul__B:
I am not aware of a USB to TTL module - on eBay at least - which has been modified especially to incorporate a series capacitor for use only with breadboarded ATMegas, making it non-standard as an RS-232 interface.I understand some have now been made with the corrected wiring and a pinout to match the FTDI module which does not contain such a capacitor in order that they do suit the Pro Mini and other ready-made boards all of which have the capacitor on the MCU board itself.
Must say that the use of all those italics and stating you are not aware, does make it come across as a little condescending; i.e. you're not aware, therefore I'm making something up.
Paul_B:
Can you point me to an example of such?
Of course,