YFROBOT 4WD chassis steered by a servo motor The product does not come

The product does not come with a battery or charger

so the frequency of the A output in the above oscilloscope capture is 13 times the rotational frequency of the motor

Additionally

In general

YFROBOT 4WD chassis steered by a servo motor The product does not comeOverview: The steering mechanism of the servo steering car chassis is different from that of a typical chassis. It uses a rear wheel motor drive with a front steering mechanism to achieve the car's forward, backward, and left and right turns, while a chassis without a steering structure usually uses a left right differential steering structure. Similar to professional remote control racing car principles, the steering part uses two pull rods connected