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Controlling Servo Angle using Joystick in Arduino IDE

Controlling Servo Angle using Joystick in Arduino IDE

About This Tutorial

In this tutorial we will control the position of a RC (hobby) servo motor with a Joystick.

Tutorial Info

Programming Platform: Arduino IDE
Difficulty: Beginner
Estimated Time: 2 Hrs
Arduino, Robotic Arm, Joystick, Servo

Components Required

Component	Quantity	Available in Kit
evive	1	evive
USB A-B Cable	1	evive
Metal Servo Motor and Accessories	1
XY-axis Joystick Module	1	Starter Kit
12C 2A DC Adapter	1	IoT Kit
Male to Female Jumper Cable 20cm	5	evive Starter Kit IoT Kit

Introduction

In this tutorial we will control the position of a RC (hobby) servo motor with a Joystick.

A servo motor is a rotary actuator that allows for precise control of angular position. It consists of a suitable motor coupled to a sensor for position feedback.

Control using evive and Arduino IDE

evive has two dedicated servo motor outputs pins.

Signal pin of servo 1 is connected to digital pin 44 and servo 2 is connected to digital pin 45.

Circuit Diagram

In the following example, I will be showing you how to control servo through channel 1. Given below is the circuit diagram:

A Servo pin has three wires (Order to be connected in evive, left to right)

Brown wire: GND
Red wire: VCC
Orange wire: Signal

Caution: Power evive using a 12V 2A power adapter for smooth functioning of servo motor. The VVR (Variable voltage) should be close to 6V.

A Joystick have 5 pins:

Ground
5V
VRx: X position connects to Analog pin 0
VRy: Y position
SW: Z press

How Joystick works?

Joystick has 2 potentiometers and a switch.
A potentiometer has a wiper sliding on a resistive strip. If the wiper is close to GND, it outputs 0V, and if it is close to VCC or 5V, it outputs 5V.
In Arduino IDE, if the wiper is close to GND you get 0 value and if it close to VCC, you get 1023. Hence you get approx. 512 when joystick is at default position.

Code

[pastacode lang=”c” manual=”%23include%20%3Cservo.h%3E%0A%0Adouble%20Angle%3B%0Adouble%20Potentiometer%3B%0AServo%20servo_3%3B%0A%0Avoid%20setup()%7B%0A%20Angle%20%3D%200%3B%0A%20pinMode(A0%2CINPUT)%3B%0A%20servo_44.attach%7B44)%3B%20%2F%2F%20init%20pin%0A%7D%0A%0Avoid%20loop()%7B%0A%20Potentiometer%20%3D%20analogRead(A0)%3B%0A%20Angle%20%3D%20((Potentiometer)%20*%20(180))%20%2F%20(1023)%3B%0A%20servo_44.write(Angle)%3B%20%2F%2F%20write%20to%20servo%0A%20delay(50)%3B%0A%7D” message=”” highlight=”” provider=”manual”/]

Control using Arduino Uno

Arduino uno has 6 PWM pins: 3, 5, 6, 9, 10, and 11 which provide 8-bit PWM output with the analogWrite() function.

We will controlling servo using Pin 3.

Circuit Diagram

Caution: Power servos using a 6V 2A power adapter for smooth functioning of servo motor.

Code

[pastacode lang=”c” manual=”%23include%20%3Cservo.h%3E%0A%0Adouble%20Angle%3B%0Adouble%20Potentiometer%3B%0AServo%20servo_3%3B%0A%0Avoid%20setup()%7B%0A%20Angle%20%3D%200%3B%0A%20pinMode(A0%2CINPUT)%3B%0A%20servo_3.attach(3)%3B%20%2F%2F%20init%20pin%0A%7D%0A%0Avoid%20loop()%7B%0A%20Potentiometer%20%3D%20analogRead(A0)%3B%0A%20Angle%20%3D%20((Potentiometer)%20*%20(180))%20%2F%20(1023)%3B%0A%20servo_3.write(Angle)%3B%20%2F%2F%20write%20to%20servo%0A%20delay(50)%3B%0A%7D” message=”” highlight=”” provider=”manual”/]

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