LinkIt ONE Tutorial - Mini Servo

Introduction

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

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Happy hacking