Keyestudio EASY PLUG Ultimate Starter Kit Manual page 145

The rotation angle of servo is controlled by regulating the duty cycle of the
PWM(Pulse-Width Modulation) signal.
The standard cycle of the PWM signal is fixed at 20ms (50 Hz), and the
pulse width is distributed between 1ms-2ms.
The pulse width corresponds to the rotation angle ( 0°～90°) of servo.
for ground, red one for power
positive, orange one for signal
line.
Included with your Micro Servo
you will find a variety of white
motor mounts that connect to
the shaft of your servo.
You may choose to attach any
mount you wish for the circuit.
It will serve as a visual aid,
making it easier to see the
servo spin.
www.keyestudio.com
142