Now that we’ve finished programming the Q Brain, we can connect the motors to the Q Brain. Before starting this process though, disconnect the battery and the BESC Programming Card from the Q Brain.
Each of the four motors have three wire leads and the Q Brain has four sets of three wire leads. Now, the order in which you connect these three wires is important because it determines the rotation direction of the motor. However, there is no easy way to tell which order is correct. So we will just have to guess. For now, just connect the three motor leads from each motor to the three wires leads from each set from the Q Brain. In a couple of steps, we will test the rotational direction of the motors, and, if necessary, we will reverse the direction by switching any two of the motor’s leads. But we are not ready for that yet.
At this point, you may also want to do a little wire routing. Some people are more particular than others about exactly how much organization the quadcopter’s wiring really needs. I, for example, like all of my wires to be completely fastened down, which you will probably notice in the pictures. But doing extensive wire routing can be frustrating and time-consuming, so if you just want to get to flying, you can minimize the amount of routing you do.