Originally Posted by Dennis Frie
AIN0, AIN1 and MOSI is available, so Arduino Nano should be a great choice as well.
With a 17 $ Arduino Nano and 23 $ GPS this could make a pretty cheap OSD
Now we just need a cheap current sensor. The one I use costs about 10 $
Even cheaper - Use the throttle position as a current draw indicator!
i.e. Y off the throttle and use the pwm signal as indicator of current. Cheaper, simple and pretty accurate. Surprised no other OSD;'s offer this option.