title_body: Will this set up fry my components? Frame: Carbon fiber 250mm
  Motors: 2300Kv 2204
  Power board: Matek built in BEC’s 12V + 5V
  FC: CC3D
  ESCs: HLGRC 30A opto (no BEC)
  Battery: Turnigy Graphene 14V 75C 4S
  Receiver: Turnigy iA6B
  My question is, this is the first time I’ll be using the opto on a drone. How do I power the FC without frying it, seeing as how there are no BECs on the ESCs?
upvoted_answer: The Matek PDB has a 5V regulator and this can be used to power the fc.
  Just wire the PDB to one of the unused ESC plugs on the FC. The FC has solder pads for 6 ESCs (right on the picture) and for a quad you usually only need 4. So the connectors 1-4 are used for the escs and you can use 5 or 6 for the PDB.
  The center pin (with + above) is 5V and the outer pin is ground (- above). Connect these two pads to the according pads on the PDB.