title_body: How to program drones that have old flight controllers? I have a few components of drones like some old FCs and old ESCs and I don't want them to go to waste. Is there any way to configure a drone that I built with those parts, as I don't think the FCs are capable of running BetaFlight. (are there any really simplistic, light things that the FC can run instead of BetaFlight?)
upvoted_answer: You can always run an older version of betaflight. Also, if you have older F3 controllers you may also like to like to look at https://github.com/spatzengr/betaflight/releases which are maintained by UAV Tech.
  
  I have used these on some older F3 boards and it breathes new life into these old boards.