![]() ![]() The step for the LED bling experiment are the same as those followed for building the breadboard circuit except that in step-2, you connect the 9 th digital pin to the positive power rail of the breadboard.Īrduino program for LED fade-in and fade-out (Version-1) int led = 9 // The digital pin to which the LED is connected The program will be uploaded into the microcontroller of Arduino board and LED in the circuit starts blinking. The magic happens when you click the upload icon in the Arduino IDE. Whereas, the pin number has to be changed in 3 different statements in version-2. This will reduce the number of iterations required to update the pin number in the program when you connect the LED to the other digital pin. In version-1 of the LED blink program LED is declared globally and is set to pin number 13. PinMode (13, OUTPUT) //pin 13 is set as output pinĭigitalWrite (13,HIGH) // Turn ON the LED on pin 13ĭigitalWrite (13, LOW) //Turn OFF the LED on pin 13 Void loop( ) // The loop function runs again and againĭigitalWrite (LED, HIGH) //Turn ON the LEDĭigitalRead (LED, LOW) // Turn off the LEDĪrduino program for LED blink (Version-2) void setup ( ) PinMode (LED, OUTPUT) //Declaring pin 13 as output pin Step-5: Close the circuit by connecting the cathode (the short chord) of the LED to the negative power strip of the breadboardĪrduino program for LED blink (Version-1) int LED =13 // The digital pin to which the LED is connected Step-4: Fix the LED to the ports below the resistor connection in the terminal strip Step-3: Connect the positive power rail to the terminal strip via a 1K ohm resistor Step-2: Connect the 13 th digital pin of Arduino to the positive power rail of the breadboard and GND to the negative Step-1: Connect the Arduino to the Windows / Mac / Linux system via a USB cable Steps in building a breadboard connection: ![]() ![]() Let’s take a look at how the breadboard circuit has to be built for both the experiments. In the process of experimenting with Arduino, writing the Arduino program is not the only important thing, building the breadboard circuit is equally important. Now, let’s take a giant leap and do some experiments with Arduino Therefore, whenever you mention the delay, keep it in milli seconds. Note: Arduino always measures the time duration in millisecond. As the name suggests, the loop( ) function executes the set of statements (enclosed in curly braces) repeatedly.ĭigitalWrite (pin-number,HIGH) // turns ON the component connected to ‘pin-number’ĭigitalWrite (pin-number, LOW) // turns OFF the component connected to ‘pin-number’ In the above example loop ( ) function is a part of execution block. The execution block hosts statements like reading inputs, triggering outputs, checking conditions etc. PinMode (pin-number, INPUT) // set the ‘pin-number’ as outputĪfter the setup ( ) function is executed, the execution block runs next. PinMode (pin-number, OUTPUT) // set the ‘pin-number’ as output This function has to be included even if there are no statements to execute. The setup function is used to initialize the pin modes and start serial communication. The setup function is the first to execute when the program is executed, and this function is called only once. Here, setup ( ) is the preparation block and loop ( ) is an execution block. Arduino programs have a minimum of 2 blocks,Įach block has a set of statements enclosed in curly braces: The structure of Arduino program is pretty simple. Now let’s discuss the basics of Arduino programming. Download the Arduino software (depending on your OS) from the official website and follow the instructions to install. The open source Arduino IDE runs on Windows, Mac OS X, and Linux. The first step in programming the Arduino board is downloading and installing the Arduino IDE. After the sketch is written in the Arduino IDE, it should be uploaded on the Arduino board for execution. The Arduino programming language is based on a very simple hardware programming language called processing, which is similar to the C language. Arduino IDE is a special software running on your system that allows you to write sketches (synonym for program in Arduino language) for different Arduino boards. After understanding the hardware of the Arduino UNO board in the previous article, let’s now get started with Arduino programming.Īrduino programs are written in the Arduino Integrated Development Environment (IDE). ![]()
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