I just thought I’d make a thread for my design instead of hogging someone else’s thread and to allow me to update the original post with further information if anything changes. This is my DB9 (with a female receptacle) RS232 Expansion Card using the FT231X from FTDI, and the SP213 from MaxLinear, I’m selling these for $32USD here, I currently have the first batch of 5 cards assembled, they just need enclosures which I am still in the process of prototyping, which will be ready to go once the c...