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Finally, some examples of this to avoid confusion. For examples of electronic source’s power output connectors we have: battery power connectors, ESC leads to the motor & buck/ldo/bec board output power. For examples of electronic load’s power input connectors we have: power distribution board input power, & ESC input power. Another system level super common example is when you want to plug something into the wall (~120VAC & ~60 Hz) (an electrical source) it has female electrical contacts and the thing you’re plugging in (an electrical load) has male contacts.
Because this design decision is so critical, if you are doing assembly on the aircraft and you are not sure be sure to ask for help and clarification. If you are dealing with an edge case, please document it here in the architecture space and even the general cases should be documented (though most are already).
Compute
The Holybro PX_ system should be placed as close to the center of rotation of the drone as possible, offset in ONE axis only to allow for the installation of the VectorNav VN-300 module. There is an arrow on the top of the Pixhawk, which should point toward direction of forward flight. Keep in mind that wires need to be accessible from the “back” of the pixhawk (I/O & FMU Output banks), as well as from the side for USB debugging as well as retrieval of the SD Card.
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