Servo - Waveshare AlphaBot User Manual

AlphaBot User Manual

Servo

the red one is the positive power line (5V), the orange one is signal line (IO) and the
brown one is power ground (GND).
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The control signal will be sent to the signal modulating chip via the receiver,
and generates the DC bias current. The servo has a reference circuit, which can
generate the reference signal in the cycle of 20ms and the width of 1.5ms. The
generated DC bias current is compared with the voltage of the potentiometer,
and you get the voltage difference which will be outputted to the motor driver
chip. The polarity of the voltage difference, positive or negative, can determine
the rotation direction of the motor. When the motor is rotating in a stable
speed, you can use the cascade reduction gear to drive the potentiometer to
run, turning the voltage difference to 0, to stop the motor.
Generally, a 20ms of time based pulse is required in controlling the servo. And the
high level should be last for at least 0.5ms-2.5ms. Taking the 180 degree
Servo is a auto-control system with
a DC motor, a reduction gear set, a
sensor and a control circuit. The
servo can control the rotation angle
of the output axis by transmitting
control signal. It has 3 control lines,
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angle servo