• Build your own diversity controller! - RC Groups
  Ever since I discovered that most RF electronics have an RSSI (relative signal strength) pin on them I have been finding different ways to use it to my advantage. In this case I can use them to make a diversity system for a fraction of the cost of a conventional diversity controller. Sure this requires a little more work than simply buying a diversity controller, but my controller uses less power and also allows me to power my entire base station from a single battery. Even my video glasses and recorder can be powered straight from this controller! I even put a voltage monitor on it. Now more worrying about charging multiple batteries and worrying about any one going dead.
  By henrik in Radiostyrt > FPV with build diversity fpv howto rssi signal strengt tutorial video

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