Last project clearly demonstrated how easily you can program the Arduino to display the required number or character on the 7 segment display. This one, is a clever application of the concept.
What it does?
This project simply uses a push button and one 7 segment display to show the number of times the given button was pressed. After it reaches 9, it will automatically go back to 0 and cycle again.
How it works?
This works on a very simple note. The push button changes the variable in the code and assigns a value to it. The code then matches a simple condition which changes the output values and displays the required number.
Materials Required:
1. Arduino UNO
2. 1 Tactile Push Button
3. Breadboard
4. Jumper cables
5. One 10KOhm resistor
6. Seven 330 resistors
Procedure:
1. Wire up the components as shown in the picture below. (Click on it to enlarge)
2. Upload the code
3. Test the button!
Code:
//Code developed by Nitish Dash.
//More projects on www.eweekend.blogspot.com
//Initialising the pin numbers
const int a=7;
const int b=6;
const int c=4;
const int d=2;
const int e=3;
const int f=9;
const int g=10;
const int buttonPin = 8;
int no = 0;
int buttonState = 0;
int lastButtonState = 0;
void setup() {
pinMode(buttonPin, INPUT);
pinMode(a, OUTPUT);
pinMode(b, OUTPUT);
pinMode(c, OUTPUT);
pinMode(d, OUTPUT);
pinMode(e, OUTPUT);
pinMode(f, OUTPUT);
pinMode(g, OUTPUT);
}
void loop(){
buttonState = digitalRead(buttonPin);
if (buttonState != lastButtonState)
{
if (buttonState == HIGH) {
no++;
}
else {
}
}
lastButtonState = buttonState;
////////////////////////
switch(no)
{
case 0:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, LOW);
digitalWrite(g, HIGH);
break;
case 1:
digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);
break;
case 2:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, HIGH);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, HIGH);
digitalWrite(g, LOW);
break;
case 3:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);
digitalWrite(g, LOW);
break;
case 4:
digitalWrite(a, HIGH);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
break;
case 5:
digitalWrite(a, LOW);
digitalWrite(b, HIGH);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, HIGH);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
break;
case 6:
digitalWrite(a, LOW);
digitalWrite(b, HIGH);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
break;
case 7:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);
digitalWrite(g, HIGH);
break;
case 8:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
break;
case 9:
digitalWrite(a, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(e, HIGH);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
break;
default: no=0; break; } }
Video: COMING SOON!
So, here ends the simple yet important demonstration of the seven segment display
which we shall use in future projects wherever needed. So, stay tuned and check
out the site next weekend! Bye and comment below for any doubts.
