DF Robot Encoder Module - Vertical

This is an 8421 absolute position encoder(Vertical) 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.

Quick Spec

• Operating Current: 150mA, 42V
• 8421 Encode: 16-gear(0-F)
• Service Life: 10000 steps
• Operating Temperature: -40 ~ 85°C
• Mounting Aperture: 2mm
• Mounting Hole Pitch: 15 x 15mm
• Dimension: 19 x 19mm
• Net Weight: 9g

Pinout

Wiring Diagram

Sample Code

/**************************************************************************/
/*!
 * @file DFR0721_V10_Demo.ino
 * @brief This example read and print the 8421 encoder code.
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [PowerLiao]([email protected])
 * @version  V1.0
 * @date  2020-07-09
 * @get from 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);
}

Resources

• Product Page
• Product Wiki
• Schematic

Shipping List

• 1 x 8421 Encoder - Vertical
• 1 x Knob