Figure 11-5 Drive Servo connection diagram
Figure 11-6
How to use an external power supply to drive the servo
The PS2X&Motor Driver Board can not only power the sevo through the main control chip to drive the
servo, but also power the servo through an external power supply to drive the servo. The voltage of the main
control chip of PS2X&Motor Driver Board is generally 5V. When driving the servo, although it can also be
driven, some servos will have a rated voltage higher than 5V. If 5V is used to supply power, there will be
steering rotation. If the force is too small, the accuracy will be affected. If the external voltage is greater than
5V (5.2-7.2V), then the steering gear will be driven, obviously the speed of the steering gear will be much
faster, and the force during rotation will be very high, strong and accurate.
The specific steps are as follows:
1) Short the power supply pin 5V and EX pin on the PS2X&Motor Driver Board through the jumper cap;
2) Connect the external power supply to the power connector on the PS2X&Motor Driver Board;
3) Turn on the power switch.
Ultrasonic obstacle avoidance module
Working Principle of Ultrasonic module
The ultrasonic transmitter emits ultrasonic in a certain direction, and starts timing at the same time as the
transmission time. When the ultrasonic travels in the air, it will return immediately when it hits an obstacle.
And the ultrasonic receiver stops the timing immediately upon receiving the reflected waves. The
propagation speed of the ultrasonic in the air is V, and according to the time difference Δt of the measured
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