Aurduino IR sensor object counter with a stepper motor and driver

Hi Guys,

I made a simple IR object counter on conveyor, componenets I am using are :

  1. Aurduino UNO
  2. 16X2 IC
  3. 1 IR Sensor.

The problevm I facing in running the stepper motor with IR counting sketch. The complete sketch is below…the IR counter working perfectly fine witout these two line in VOID LOOP

** // step one revolution in one direction:**
** //Serial.println(“forward”);**
** myStepper.step(stepsPerRevolution);**

…pls help in correcting the code…

// include the library code:
#include <LiquidCrystal.h>
#include <Stepper.h>

const int stepsPerRevolution = 360; // change this to fit the number of steps per revolution
// for your motor

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(13, 12, 5, 4, 3, 2);
// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8,9,10,11);

// set up a constant for the tilt switchPin
const int switchPin = 6;

int hits = 0;

// variable to hold the value of the switchPin
int switchState = 0;

// variable to hold previous value of the switchpin
int prevSwitchState = 0;

void setup() {

// set the speed at 60 rpm:

// initialize the serial port:

// set up the number of columns and rows on the LCD
lcd.begin(16, 2);

// set up the switch pin as an input

lcd.setCursor(0, 0);
lcd.print(“Hit the button”);
lcd.setCursor(0, 1);
lcd.print(“to increment”);


void loop() {

// step one revolution in one direction:

// check the status of the switch
switchState = digitalRead(switchPin);

// compare the switchState to its previous state
if (switchState != prevSwitchState) {
if (switchState == LOW ) {
hits = hits + 1;
lcd.setCursor(0, 0);
lcd.setCursor(0, 1);

if(hits == 100){

// save the current switch state as the last state
prevSwitchState = switchState;

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This code:


blocks the loop for the time it takes the stepper to execute a full revolution. While it’s blocking your switchPin is not getting polled. You could avoid this long blocking delay by only doing one step at a time rather than a full revolution.