Hi,
I have both an UNO and a Due so using either of these I wish to create a means to output text to overlay a video using an FPV camera and transmitter. It would probably need to be a sinusoidal output so I am leaning towards using the Due. I would presume to use pin 14 (Digital TX) but am scratching my head over what to use in the sketch and whether I would need any further hardware.
The FPV camera and UHF TX are separate to the Arduino and the output sinusoidal wave from the Arduino would be fed into the input line of the FPV module.