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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();

}

<p>How easy would it be to modify this so that when the counter hits a certain number it triggers a micro switch?</p>
<p>Very easy.</p><p>Just add a &quot;if&quot; statement.</p>
<p>I've been needing a 7 segment arduino up down counter that goes from 0 to 9, can anyne help?</p>
<p>What a coincidence...</p><p>I just published my own Up/Down counter :) :)</p><p>https://www.instructables.com/id/7-Segment-UpDown-Counter/</p>

About This Instructable

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