PCA9685 without power supply

I from Portugal and I was not able to find one of the suggested models of RC car for Donkey car and so I’m building a custom one.

My problem is related to the PCA9685 controller. In the hardware instructions I have seen, the PCA9685 is not connected to any power supply (usually 5V). So how does the Donkey car supply the steering servo? Is it supplied by the same battery that supplies to ESC?


The car ESC will supply 5 vdc to the servo pins on the PCA9685 when its servo cable is attached to the servo pins on the JPCA9685.


google “RC ESC BEC” and you should get an understanding of how power gets from the battery, through the ESC and to the Servo.