### Project 10 Servo Motor Control

**1.Introduction**

Servomotor is a commonly used positional-servo actuator.

In this project, we use graphical programming . First , read out analog value controlled by adjustable potentiometer module, ranging from 0 to 1023. Then, map the value to 0-180. Finally, set the mapped value as angle of motor rotation.

**2.Materials Required**

1. KEYESTUDIO UNO Control Board *1
2. V5 Sensor Shield*1
3. Adjustable Potentiometer*1
4. Micro Servo*1
5. Female to Female Dupont Line*3

**3.Connection Diagram**

Note: do not use the USB port for power supply because the current it needs is more than 500ma，it may lead to USB port burnt out. We recommend external power supply.

![](media/image-20251201161958192.png)

![](media/image-20251201162012605.png)

**4.Sample Code**

```c
#include <Servo.h>
int _ABVAR_1_val = 0 ;
int _ABVAR_2_servo = 0 ;
Servo servo_pin_9;

void setup()
{
  servo_pin_9.attach(9);
}

void loop()
{
  _ABVAR_1_val = analogRead(0) ;
  _ABVAR_2_servo = map ( _ABVAR_1_val , 0 , 1023 , 0 , 180 )  ;
  servo_pin_9.write( _ABVAR_2_servo );
}
```

**5.Result**

Put the program into the development, and we can use potentiometer to control servomotor.

Note:place Servo folder into the compiler of \Arduino\libraries. Otherwise, you can’t compile. Just like this.