Pixhawk, aux out and video switch


I'm trying to work out how to use Pin 4 on the aux out of a pixhawk (on my IRIS) to act as a servo switch controlled by CH 7 on my FS-TH9X radio to connect to a simple video switch to switch between two FPV cameras on the IRIS. 

The video switch is from hobbyking and would normally connect to a standard RC receiver requiring 5v (or 3.3v), gnd and signal.  Not sure how to get aux out 3 to behave like this.

Any help appreciated.



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  • Again, older post but this information is needed. Thanks in advance.

  • any luck? I'm trying the same thing

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