LinkIt ONE Tutorial - Mini Servo
What We're Doing
Servo motor (servo) is commonly used in small robots and other machines to control angular position. It is wrapped by a small gear box, and positioned by the timing control pulses. In this section we control the angular position of the mini servo with the help of potentiometer.
Things you need
-
LinkIt One x 1
-
Break board x 1
-
Slide Potentiometer 10kΩ x 1
-
Servo x 1
Schematic
Connection
Code
Please click on the button below to download the code for the kit:
You can unzip the file to the Examples folder of your Arduino IDE.
To access the demo code open:
File -> Examples -> Starter Kit for LinkIt -> Basic -> L7_Servo
#include <Servo.h>
Servo myservo; // create servo object to control a servo
int potpin = A0; // analog pin used to connect the potentiometer
int val; // variable to read the value from the analog pin
void setup()
{
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}
void loop() {
val = analogRead(potpin); // reads the value of the potentiometer (value between 0 and 1023)
val = map(val, 0, 1023, 0, 179); // scale it to use it with the servo (value between 0 and 180)
myservo.write(val); // sets the servo position according to the scaled value
delay(15); // waits for the servo to get there
}
Troubleshooting
-
There are three pins in servos and they are color coded respective to their functionality yellow-analog port red – positive, dark brown – ground. So please make connections according to its functionality.
-
Ensure that 5v power supply is connected to the board.
Making it better
If the mini steering worked, we can adjust the speed of rotation by using a potentiometer. Upload the following code to produce different functionality.
To access the demo code open:
File -> Examples -> Starter Kit for LinkIt -> Extend_Lesson –> L7_Servo_Speed
More ideas
How do you control two servo motors simultaneously so that you can make a robot?
Reference
Tech Support¶
Please submit any technical issue into our forum.
