Introduction: Up Down Counter Using Arduino

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();

}

Comments

author
rhorne5 (author)2017-02-16

How easy would it be to modify this so that when the counter hits a certain number it triggers a micro switch?

author
Adil95 (author)rhorne52017-02-17

Very easy.

Just add a "if" statement.

author
Oujidon123 (author)2016-11-21

I've been needing a 7 segment arduino up down counter that goes from 0 to 9, can anyne help?

author
Eric Brouwer made it! (author)2016-11-20

What a coincidence...

I just published my own Up/Down counter :) :)

https://www.instructables.com/id/7-Segment-UpDown-Counter/

Top Done.jpg

About This Instructable

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