I am building my first quadcopter and have multiple questions. I am using a Crius MWC Multiwii SE 2.6 flight controller which will get input from a Raspberry Pi Zero. I have this 4in1 ESC and this PDB. The battery is LiPo 4S 45C 1550mAh.
1.) Since the 4in1 ESC has one output for each of the 4 motors. Can I connect these to the corresponding inputs on the MultiWii that would normally be used if I had 4 separate ESCs? When using 4 separate ESCs each would have additional Ground and Voltage which would be missing when using the 4in1 ESC.
My idea was to connect the 5V input and GND of the MultiWii to the PDB but I am not sure if this will suffice in powering the entire MultiWii. I want to connect the Raspberry to the MultiWii via TX/RX Pins, same question as as before: Do I need additional GND and 5V here if I connect the entire Multiwii to the PDB?
2.) I wanted to connect the Pi Zero also to the PDB. I read that its more secure to use PWR USB port. I am thinking of sacrificing an USB cable and soldering the ends to the PDB. Is this really more secure than using the GPIO Pins and can I power both, Raspberry and MultiWii through the PDB?
Thanks in advance