There's a pretty regular stream of posts from beginners listing parts and asking for feedback, I thought I'd post some pics and specs for a quad which I've partially rebuilt three times, noting some…Continue
"I'd avoid a 78xx regulator, they are very ineffecient. I'd recommend a buck-converter based regulator, like most discrete BECs are. I use one of these to power my gimbal, video tx,, and minimosd from a 4s."
"I would not assume that the battery negative is the same as the BEC ground.
On a somewhat related note, I would consider connecting the batteries in full parallel; i.e., tying the +s and -s together (with high current wiring/connectors). This…"
"I would second Joes opinion. The second ground is definitely required. I'd begin by swapping escs to see if the problem follows.
Also, once both grounds are connected as needed, you will need to recalibrate the escs if you originally did it…"