I'm new to the UAV world and don't yet have a drone of my own, but recently a member of the DIYDrones community blogged about one of my products here: http://diydrones.com/profiles/blogs/osd-object-tracking-and. I was also contacted by quite a few FPV enthusiasts about the possibilities. I hadn't thought of using my Video Experimenter Arduino shield as a drone OSD solution, but was intrigued by the idea, so I experimented with overlaying GPS data onto a camera image to produce an Arduino-based OSD implementation.
In the process, I learned a lot more about the UAV world, and I blogged all the details about this on my site, including the source code, wiring, etc. I'm not claiming this is an out-of-the-box solution, but it seems possible to perform the data overlay at a ground station or aboard the aircraft itself. I'm interested in any feedback you might have.
so you would just need this small chip, a few resistors, capacitors and an atmega? that's great!
looking forward to see this as a good solution for diydrones OSD