An Arduino based calculator is a great way to learn about electronics and programming. In this project we will use an Arduino Uno and a few other components to make a calculator that can add, subtract, multiply, and divide.

Arduino is an open-source electronics platform based on easy-to-use hardware and software. It’s a great way to learn about electronics and programming. In this project, we’ll show you how to make a simple calculator using an Arduino.

You can use this calculator for simple arithmetic operations like addition, subtraction, multiplication, and division. You can also use it to calculate more complex operations like square root and exponentiation.

This project is perfect for beginners. It’s a great way to learn about the Arduino, programming, and electronics. Let’s get started!

### What You Need

In order to make an Arduino based calculator, you will need:
-An Arduino board
-Jumper wires
-10k ohm resistors
-Pushbuttons

You will use the Arduino to create a basic calculator that can add, subtract, multiply, and divide. The buttons will be used to input the numbers and the operator. The resistors will be used as pull-down resistors to keep the buttons from bouncing.

### Setting Up The Arduino

Arduino is an open-source electronics platform based on easy-to-use hardware and software. It’s a great way to get started with electronics, and it’s perfect for anyone who wants to build their own interactive electronic projects.

In this tutorial, we’ll show you how to use an Arduino to create a simple calculator. We’ll use a four-digit seven-segment display to show the numbers, and we’ll use four pushbuttons to input the numbers.

This project is perfect for anyone who wants to learn how to use an Arduino, and it’s a great way to get started with interactive electronics. Let’s get started!

First, let’s gather our materials. We’ll need:

– 1 Arduino Uno
– 1 four-digit seven-segment display
– 4 pushbuttons
– Jumper wires

Now that we have our materials, let’s hook everything up.

Start by connecting the Arduino to the seven-segment display. The display has 12 pins, and we’ll need to connect all of them to the Arduino. We’ll use the following pins:

– Arduino pin 2 to display pin 11
– Arduino pin 3 to display pin 10
– Arduino pin 4 to display pin 9
– Arduino pin 5 to display pin 8
– Arduino pin 6 to display pin 7
– Arduino pin 7 to display pin 6
– Arduino pin 8 to display pin 5
– Arduino pin 9 to display pin 4
– Arduino pin 10 to display pin 3
– Arduino pin 11 to display pin 2
– Arduino pin 12 to display pin 1
– Arduino pin 13 to display pin 12

Next, connect the pushbuttons to the Arduino. The buttons have four legs, and we’ll need to connect two legs of each button to the Arduino. We’ll use the following pins:

– Arduino pin 14 to button 1 leg 1
– Arduino pin 15 to button 1 leg 2
– Arduino pin 16 to button 2 leg 1
– Arduino pin 17 to button 2 leg 2
– Arduino pin 18 to button 3 leg 1
– Arduino pin 19 to button 3 leg 2
– Arduino pin 20 to button 4 leg 1
– Arduino pin 21 to button 4 leg 2

Now that everything is hooked up, let’s write the code.

We’ll start by defining some variables. We’ll need four variables, one for each button. We’ll call them “button1,” “button2,” “button3,” and “button4.”

int button1 = 14;
int button2 = 15;
int button3 = 16;
int button4 = 17;

Next, we’ll need to set up the Arduino. We’ll do this in the “setup” function.

void setup() {
// put your setup code here, to run once:

}

In the “setup” function, we’ll start by setting the button pins to be input pins. We’ll do this with the “pinMode” function.

pinMode(button1, INPUT);
pinMode(button2, INPUT);
pinMode(button3, INPUT);
pinMode(button4, INPUT);

Next, we’ll need to set up the seven-segment display. We’ll do this by sending a “0” to each of the display pins.

digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
digitalWrite(10, LOW);
digitalWrite(11, LOW);
digitalWrite(12, LOW);
digitalWrite(13, LOW);

Now that we’ve set up the Arduino, let’s write the “loop” function.

void loop() {
// put your main code here, to run repeatedly:

}

In the “loop” function, we’ll start by reading the button values. We’ll do this with the “digitalRead” function.

Next, we’ll need to check if any of the buttons are pressed. We’ll do this with an “if” statement.

if (button1Value == HIGH || button2Value == HIGH || button3Value == HIGH || button4Value == HIGH) {

}

If any of the buttons are pressed, we’ll need to figure out which one. We’ll do this with another “if” statement.

if (button1Value == HIGH) {

} else if (button2Value == HIGH) {

} else if (button3Value == HIGH) {

} else if (button4Value == HIGH) {

}

Now that we know which button is pressed, we can do something with that information. In this case, we’ll use the buttons to input numbers into a simple calculator.

We’ll start by defining some variables. We’ll need two variables, one for the first number and one for the second number. We’ll call them “num1” and “num2.”

int num1 = 0;
int num2 = 0;

If the first button is pressed, we’ll add one to “num1.”

if (button1Value == HIGH) {
num1 = num1 + 1;
}

If the second button is pressed, we’ll add two to “num1.”

if (button2Value == HIGH) {
num1 = num1 + 2;
}

If the third button is pressed, we’ll add three to “num1.”

if (button3Value == HIGH) {
num1 = num1 + 3;
}

If the fourth button is pressed, we’ll add four to “num1.”

if (button4Value == HIGH) {
num1 = num1 + 4;
}

Now that we’ve input the first number, we’ll need to input the second number. We’ll do this in the same way, but we’ll use a different set of buttons.

We’ll start by defining some variables. We’ll need two variables, one for the first number and one for the second number. We’ll call them “num1” and “num2.”

int num1 = 0;
int num2 = 0;

If the first button is pressed, we’ll add one to “num2.”

if (button1Value == HIGH) {
num2 = num2 + 1;
}

If the second button is pressed, we’ll add two to “num2.”

if (button2Value == HIGH) {
num2 = num2 + 2;
}

If the third button is pressed, we’ll add three to “num2.”

if (button3Value == HIGH) {
num2 = num2 + 3;
}

If the fourth button is pressed, we’ll add four to “num2.”

if (button4Value == HIGH) {
num2 = num2 + 4;
}

Now that we have both numbers, we can do something with them. In this case, we’ll add them together and display the result on the seven-segment display.

We’ll start by defining a variable for the result. We’ll call it “result.”

int result = 0;

Next, we’ll add the two numbers together and store the result in the “result” variable.

result = num1 + num2;

Finally, we’ll display the result on the seven-segment display.

digitalWrite(2, result & 1);
digitalWrite(3, (result >> 1) & 1);
digitalWrite(4, (result >> 2) & 1);
digitalWrite(5, (result >> 3) & 1);
digitalWrite(6, (result >> 4) & 1);
digitalWrite(7, (result >> 5) & 1);
digitalWrite(8, (result >> 6) & 1);
digitalWrite(9, (result >> 7) & 1);
digitalWrite(10, (result >> 8) & 1);
digitalWrite(11, (result >> 9) & 1);
digitalWrite(12, (result >> 10) & 1);
digitalWrite(13, (result >> 11) & 1);

And that’s it! Now you know how to use an Arduino to create a simple calculator. Try adding more buttons and functions to make it more complex. Have fun!

### The Code

Calculators are one of the most commonly used tools in both our personal and professional lives. They allow us to quickly and easily perform mathematical operations that would otherwise be very time-consuming. But have you ever wondered how calculators work?

The vast majority of calculators on the market today are based on the same basic principle: they use a series of electronic circuits to perform the necessary calculations, and then display the results on a digital screen.

One of the most popular types of calculator is the Arduino based calculator. Arduino is a open-source electronics platform based on easy-to-use hardware and software. It’s a great platform for beginners to get started with electronics and programming.

So how do you make an Arduino based calculator? It’s actually quite simple!

First, you’ll need to gather the following materials:

-An Arduino board
-A set of push buttons
-A set of resistors
-A digital display

Next, you’ll need to connect the components together. The specific connections will vary depending on the type of Arduino board you’re using, but the general idea is to connect the push buttons to the Arduino board, and then connect the digital display to the Arduino board.

Once everything is connected, you’ll need to write a program to make the calculator work. The specifics of the program will again vary depending on the type of Arduino board you’re using, but the general idea is to read the input from the push buttons and then use that data to perform the necessary calculations. Finally, the results of the calculations are displayed on the digital screen.

And that’s it! With just a few simple components and a bit of programming, you can create your own Arduino based calculator.

## Putting It All Together

Now that you have all the pieces of your Arduino-based calculator, it’s time to put it all together!

1. Solder the header pins onto the Arduino board.

2. Connect the positive lead of the LED to digital pin 13 on the Arduino board.

3. Connect the negative lead of the LED to one of the ground pins on the Arduino board.

4. Plug the Arduino board into your computer using a USB cable.

5. Open the Arduino IDE software on your computer.

6. Copy and paste the following code into the Arduino IDE:

int ledPin = 13; // LED connected to digital pin 13

void setup() {
// initialize the digital pin as an output:
pinMode(ledPin, OUTPUT);
}

void loop() {
// turn the LED on (HIGH is the voltage level)
digitalWrite(ledPin, HIGH);
// wait for a second
delay(1000);
// turn the LED off by making the voltage LOW
digitalWrite(ledPin, LOW);
// wait for a second
delay(1000);
}

7. Click the “Upload” button in the Arduino IDE to upload the code to the Arduino board.

8. Once the code has been successfully uploaded, you should see the LED on the Arduino board blinking. If you don’t see the LED blinking, make sure that the code is correct and that the LED is properly connected.

And that’s it! You’ve now created a simple Arduino-based calculator.

### Conclusion

As you can see, making an Arduino based calculator is not difficult. In fact, it is quite easy once you get the hang of it. With a little bit of practice, you should be able to make one in no time. 