Introduction: Up Down Counter Using Arduino

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About: Technology enthusiastic, crazy about embedded system, love Arduino and raspberry pi.

Hello Ardu-man!

Today I am going to make a UP/DOWN counter using Arduino.

Step 1: Things That Are Required

1) Arduino Uno (any board)

2) Breadboard

3) 2x1k ohm resistor

4) 2x push switch

5) 1x 10k potentiometer

6) 1x 16x2 lcd

7) Jumper wires

Step 2: Circuit Diagram

Step 3: Code

//UP DOWN Counter.

#include <LiquidCrystal.h>

LiquidCrystal lcd(12,11,5,4,3,2);

int A;

int B;

int t;

int ctr=0;

void setup()

{

lcd.begin(16,2);

lcd.print("UP DOWN Counter");

delay(2000);

}

void loop()

{

A = analogRead(A0);

B = analogRead(A1);

t = 300;

if(A < t && B > t)

{

ctr = ctr + 1;

delay(900);

}

else

{

ctr = ctr;

}

if(A > t && B < t)

{

ctr = ctr -1;

delay(900);

}

else

{

ctr = ctr;

}

lcd.setCursor(0,0);

lcd.print("Counter : ");

lcd.setCursor(10,0);

lcd.print(ctr);

delay(100);

lcd.clear();

}

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