In this article, KDE is recommending what looks to be powering OPTO ESC systems from the PM both to the power connector on top of the Pixhawk, and also connecting to the power rail on the back.
This is my setup, which as I understand KDE, is incorrect. This is from the Arducopter Wiki minus the ESC BEC and triple redundancy backups. So, my question is, what IS the correct way to wire up my Pixhawk using OPTO ESC's? Should I splice into the PM and add +/- to the power rail to complete the "loop"? I'm using a Hobby Wing BEC for backup power.
Replies
The way you have it actually looks correct. Its different than what he has but it should work. The reason why yours still works even though you don't have a connection from PM to the rails is because you have a BEC already going to the rails. That BEC powers the rail and therefore the reciever and so you don't have to run a power line from the PM to do the same task. In fact, I would recommend against it so you don't have two voltage regulators fighting to the death to achieve their slightly different factory setting voltages.
Looks good to me man.
-Kevin