I found this screenshot... The boards are similar, but not the same.
The $50 version from DIYDrones uses better components and is less prone to overheating.
The RCTimer version has heat issues especially when powering the video-chip side with 12V.
The WhiteSpy version appears to be very similar to the RCTimer version, BUT has all the voltage dividers for 1st/2nd battery, RSSI and Amps already part of the board (plus pin out). And it is cheap, I just ordered one.
- OSD Board Versions
- OSD_Board_Versions.jpg (75.96 KiB) Viewed 24495 times
I also found a VERY nice video explaining the technical details...
JR from the OP project also has a good thread on the OP forum.
I really like the "radar" screen he created...
- OP OSD Radar
- OSD_OP_JR_Radar.jpg (59.26 KiB) Viewed 24495 times
It shows you the relative position and heading in a simple radar plot, similar to fighter-jet displays. Pretty cool. I wish I could replicate that, but my programming skills are BASIC (literally).