⚠️ ARCHIVE NOTICE ⚠️
This documentation is no longer being maintained!
- The new ArduSub docs are located in the ArduPilot wiki. Updated pages will be redirected.
- The Companion Computer Software is also archived, and has been replaced by BlueOS.
- For Control Station Software, see QGroundControl or Cockpit (our new alternative).
Relays
Relays are useful for turning higher voltage (>5V DC) auxiliary equipment on and off.
Up to three relays can be operated via joystick button functions when connected to the appropriate signal outputs.
Most autopilots cannot provide power to the output rail to trigger the relays, so a 5V power supply will need to be connected to an empty output.