Ks0194 keyestudio Micro Servo
接线方法
Sample Program There are two ways to control a servomotor with Arduino. One is to use a common digital sensor port of Arduino to produce square wave with different duty cycle to simulate PWM signal and use that signal to control the positioning of the motor. Another way is to directly use the Servo function of the Arduino to control the motor. In this way, the program will be easier but it can only control two-contact motor for the servo function, only digital pin 9 and 10 can be used. The Arduino drive capacity is limited. So if you need to control more than one motor, you will need external power.
Method 1: Sample Program A ////////////////////////////////////////////////////////// int servopin=9;// select digital pin 9 for servomotor signal line int myangle;// initialize angle variable int pulsewidth;// initialize width variable int val; void servopulse(int servopin,int myangle)// define a servo pulse function { pulsewidth=(myangle*11)+500;// convert angle to 500-1490 pulse width digitalWrite(servopin,HIGH);// set the level of servo pin as “high” delayMicroseconds(pulsewidth);// delay microsecond of pulse width digitalWrite(servopin,LOW);// set the level of servo pin as “low” delay(20-pulsewidth/1000); } void setup() { pinMode(servopin,OUTPUT);// set servo pin as “output” Serial.begin(9600);// connect to serial port, set baud rate at “9600” Serial.println("servo=o_seral_simple ready" ) ; } void loop()// convert number 0 to 9 to corresponding 0-90 degree angle, LED blinks corresponding number of time { val=Serial.read();// read serial port value if(val>='0'&&val<='9') { val=val-'0';// convert characteristic quantity to numerical variable val=val*(90/9);// convert number to angle Serial.print("moving servo to "); Serial.print(val,DEC); Serial.println(); for(int i=0;i<=50;i++) // giving the servo time to rotate to commanded position { servopulse(servopin,val);// use the pulse function } } } //////////////////////////////////////////////////////////
Method 2:
Let's first take a look at the Arduino built-in servo function and some common statements. 1. attach（interface）——select pin for servo, can only use pin 9 or 10. 2. write（angle）——used to control the rotate angle of the servo, can set the angle among 0 degree to 90 degree. 3. read（）——used to read the angle of the servo, consider it a function to read the value in the write() function. 4、attached（）——determine whether the parameter of the servo is sent to the servo pin. 5、detach（）—— disconnect the servo and the pin, and the pin(digital pin 9 or 10) can be used for PWM port. Note: the written form of the above statements are " servo variable name. specific statement ()", e.g. myservo. Attach (9). Still, connect the servo to pin 9.
Sample Program B: //////////////////////////////////////////////////////////
- include <Servo.h>// define a header file. Special attention here, you can call the servo function directly from Arduino's software menu
bar Sketch>Importlibrary>Servo, or input #include <Servo.h>. Make sure there is a space between #include and <Servo.h>. Otherwise, it will cause compile error. Servo myservo;// define servo variable name void setup() { myservo.attach(9);// select servo pin(9 or 10) } void loop() { myservo.write(90);// set rotate angle of the motor } //////////////////////////////////////////////////////////
Example Result
Above are the two methods to control the servo. You can choose either one according to your liking or actual need.