I ended up using a turnigy PWM switch on AUX1. I set AUX1 in parameters to be the camera trigger. Once you do that, you can tie the trigger to be distance based, or TX switch based. I am using a Cannon with CHDK and the default script…"
"Servo activation just doesn't work. Same issue as many others have reported - the pulse bounces between 0 and 10-11 according to chdk. Whether through passthrough or servo on any channel, the trigger will not fire using the methods in this thread.…"
"I have this working as a relay in APM Plane, but I am unable to use a channel to trigger the camera. I have set RC7_function to 10: camera_trigger and channel 7 assigned to a switch, but it doesn't trigger the camera. The camera triggers fine…"
"You can power by using any/all options. There are 3: USB, power module port, servo rail. Use them all, use 2, or use just 1. Pixhawk will select the best source magically. Just supply the proper voltage to the correct pins at each location. The pin…"
"The pixhawk does not send power out the servo rail. You should connect a 5V BEC or whatever you choose to get 5V to your servos to the servo/input/output pins. It will provide power to the rail, and to the pixhawk in case of main power in failure.…"
"So I think I've narrowed mine down to the throttle idle. If I allow the motors to idle, I lose sync. If I don't idle when armed and instead go to throttle low from off, I am not losing sync. I'll have to test more to confirm as I only ran 2 more…"
"Add me to the list of pixhawk users with sync issues even after following all the information I can find on the topic. Using signal ground, 400Hz, modifying min throttle, esc. 0 issues during calibration or on other flight controllers, but issues…"