Published June 8, 2018 © Apache-2.0

Rotary Encoder or Arduino 360 Degree Encoder

Working principles of rotary encoder are demonstrated here.

BeginnerProtip1 hour12,841

Rotary Encoder or Arduino 360 Degree Encoder

Things used in this project

Hardware components

Arduino UNO

Rotary Encoder with Push-Button

Software apps and online services

Arduino IDE

Story

Description

A rotary encoder is an incremental electromechanical component with a shaft that converts the angular position or motion of a shaft or axle to digital code. The output of incremental encoders provides information about the motion of the shaft, which is typically further processed in processor / controllers into information such as speed, distance, and position.The shaft has unlimited 360 degree rotation.

Specification

Model: SN-360

Type: Incremental Encoder

Cycles per revolution (CPR): 20

Working voltage: 0 – 5V

Material: PCB + Brass

Weight: 10g

Size: 32 x 19 x 30mm

Step 1: Material Preparation

To do this tutorial, you will need as following below:

Arduino 360 Degree Encoder2. Arduino Uno Board and USB Cable3. Female-Male Jumper Wires

Step 2: Pinout Details

CLK : Pin A

DT : Pin B

S : No push switch connection

+ : Power

GND : Grounding

Step 3: Pin Connection

1 / 2

Connect Arduino 360 Degree Encoder to Arduino Uno as following :

VCC to 5V

GND to GND

CLK to D3

CLK to D4

and then connect Arduino Uno to your PC.

Step 4: Sample Source Code

Step 5: Serial Monitor

After you have succesfully uploaded it into you Arduino Uno Board. Go to tools > Serial Monitor and you will see "BEGIN" printed on the serial monitor. Now, you can start to rotate your encoder's shaft and see the output printed on the serial monitor.

Step 6: Result

When you rotate the shaft clockwise, serial monitor will print

Rotate ClockwiseEncoder Count: 1

Rotate Clockwise Encoder Count: 2

When you rotate clockwise, serial monitor will print

Rotate CounterclockwiseEncoder Count: 0

Rotate Counterclockwise Encoder Count: -1

You can feel a small “clicks” as you turn the encoder.

Schematics

Code

CODE

/**************
 * VCC to 5V  *
 * GND to GND *
 * CLK to D3  *
 * CLK to D4  *
 **************/
int pinA = 3;
int pinB = 4; 
int encoderPosCount = 0; 
int pinALast;  
int aVal;
boolean bCW;

 void setup() 
 { 
  //SET pinA and pinB and input
   pinMode (pinA,INPUT);
   pinMode (pinB,INPUT);
   pinALast = digitalRead(pinA);//Read Pin A 
   Serial.begin (9600);
   Serial.println("BEGIN");
   Serial.println();
 } 

 void loop() 
 { 
   aVal = digitalRead(pinA);
   if (aVal != pinALast)
   { 
     if (digitalRead(pinB) != aVal) //We're Rotating Clockwise
     { 
       encoderPosCount ++;
       bCW = true;
     } 
     
     else 
     
     {
       bCW = false;
       encoderPosCount--;
     }
     
     if (bCW)
     {
       Serial.println ("Rotate Clockwise");
     }
     
     else
     
     {
       Serial.println("Rotate Counterclockwise");
     }
     
     Serial.print("Encoder Count: ");
     Serial.println(encoderPosCount);
     Serial.println();
   } 
   
   pinALast = aVal;
 }

Credits

SURYATEJA

18 projects • 59 followers

Rotary Encoder or Arduino 360 Degree Encoder

Things used in this project

Hardware components

Software apps and online services

Story

Description

Specification

Step 1: Material Preparation

Step 2: Pinout Details

Step 3: Pin Connection

Step 4: Sample Source Code

Step 5: Serial Monitor

Step 6: Result

Custom parts and enclosures

CONNECTIONS

Schematics

CONNECTIONS

Code

CODE

Credits

SURYATEJA

Comments

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Rotary Encoder or Arduino 360 Degree Encoder

Rotary Encoder or Arduino 360 Degree Encoder

Things used in this project

Hardware components

Software apps and online services

Story

Description

Specification

Step 1: Material Preparation

Step 2: Pinout Details

Step 3: Pin Connection

Step 4: Sample Source Code

Step 5: Serial Monitor

Step 6: Result

Custom parts and enclosures

CONNECTIONS

Schematics

CONNECTIONS

Code

CODE

Credits

SURYATEJA

Comments

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