16 Gear 0-F Rotary Encoder Switch 8421 Horizontal Wiki

Introduction

This is an 8421 absolute position encoder with 16-gear code(0-F). The mechanical position determines the uniqueness of each position of the encoder. Compared to a potentiometer, it doesn’t require memory, reference point and constant counting. Whenever you need the position, you can just easily read it. In this case, the anti-interference of the encoder and the reliability of the data are greatly improved. And because of the absolute uniqueness of each position, the anti-interference ability, and no power-off memory function required, this product is widely used in many kinds of industrial systems for device status controlling.

Features

Long Service Life
8421 Code
Breakout, easy to install

Application

Industrial Automation
Automotive Electronics
Multimedia Speaker
Instruments and Apparatuses
Smart Home and Other Fields

Specification

Current: 150mA, 42V
8421 Encode: 16-gear(0~F)
Service Life: 10000 steps
Operating Temperature: -40~85℃
Module Size: 14x19mm/0.55x0.75”
Mounting Aperture: 2.0mm
Mounting Hole Pitch: 15mm

Board Overview

Num	Label	Description
1	8	8421 BCD code 8 port
2	4	8421 BCD code 4 port
3	2	8421 BCD code 2 port
4	1	8421 BCD code 1 port
5	C	Common Port-Connect to VCC
6	X	Common Port-Connect to GND

Truth Table

Tutorial

Requirements

Hardware
- DFRduino UNO R3 (or similar) x 1
- 8421_Encoder-Vertical x1
- Wires

Software
- Arduino IDE

Connection Diagram

Sample Code

Upload the following codes to your mainboard, open the serial monitor, then you will find the output code value.

/**************************************************************************/
/*
    @file       DFR0722_V10_Demo.ino
    @author     PowerLiao (DFRobot)
    @version    V1.0
    @date       2020-07-09
    @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
    @licence    The MIT License (MIT)
    @breif      This example read and print the 8421 encoder code.

    This demo and related libraries are for [DFR0722]8421 Encoder-Horizontal(V1.0)
    Check out the links below for tutorials and connection diagrams
    Product(CH): http://www.dfrobot.com.cn/
    Product(EN): https://www.dfrobot.com/

*/
/**************************************************************************/



#define setbit(data,b) (data|=(1<<b)) //set the b bit of data to 1
#define clrbit(data,b) (data&=~(1<<b)) //set the b bit of data to 0

uint8_t code8421 = 0;
const uint8_t code8Pin = 5;
const uint8_t code4Pin = 4;
const uint8_t code2Pin = 3;
const uint8_t code1Pin = 2;

void setup() {
  Serial.begin(115200);
  Serial.println("8421 Encoder Starts up!");
  pinMode(code8Pin, INPUT);
  pinMode(code4Pin, INPUT);
  pinMode(code2Pin, INPUT);
  pinMode(code1Pin, INPUT);
}

void loop() {
  //According to the pin level and set the corresponding bit to 0 or 1
  if (digitalRead(code8Pin) == HIGH){
    setbit(code8421, 3);
  }else{
    clrbit(code8421, 3);
  }

  if (digitalRead(code4Pin) == HIGH){
    setbit(code8421, 2);
  }else{
    clrbit(code8421, 2);
  }

  if (digitalRead(code2Pin) == HIGH){
    setbit(code8421, 1);
  }else{
    clrbit(code8421, 1);
  }

  if (digitalRead(code1Pin) == HIGH){
    setbit(code8421, 0);
  }else{
    clrbit(code8421, 0);
  }

  //Output the code in hexadecimal 
  Serial.print("Now code8421 is:  ");
  Serial.println(code8421, HEX);
  delay(1000);
}

Expected Results

The module print out the current code value every 1 second.

Result

FAQ

For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

16 Gear 0-F Rotary Encoder Switch 8421 Horizontal Wiki - DFRobot