Today we are going to tell you how you can generate analog output from Arduino. You can use this output to do various tasks. One of the most easiest and simplest thing is controlling brightness of an LED.
Background:
Arduino has several PWM pins. You can use this pins to vary the output . So once you are able to vary the output you can do several tasks. One of the most important application is controlling speed of the motors.
Today we will start our Arduino tutorial with a very basic thing. There are many coders around the world who write codes to develop some cool softwares to run on computers, smartphones and tsablets. But there are very few who writes code to control hardware using their program. Writing a general basic program won't do that. You need some special devices called microcontrollers and microcomputers with GPIO pins which can control digital devices, read sensor data and perform different actions.
Arduino is most popular open-source board microcontroller. It has a number of digital, analog PWM pins which will serve our purpose. Here we will use Arduino to make LED blink every second.
Hardware Required
Arduino UNO
Breadboard
LED - We are using a red LED here
220ohm resistor
Some Jumper wires
Build the circuit
Connect a M-M jumper from GND to breadboard
Connect GND of breadboard to -ve terminal of LED via resistorto avoid burning it.
Connect +ve of LED to pin3 of Arduino
Write the code/sketch
Open Arduino IDE and then go to Tools > Board > Arduino Uno.
And also select Tools > Port > Arduino COM Port (COM3/COM4 like)
const int LED = 3; //Pin to which LED is connected to Arduino
void setup() {
pinMode(LED, OUTPUT); //We would see output from this pin
}
void loop() {
digitalWrite(LED, HIGH); //Set HIGH voltage
delay(1000);
digitalWrite(LED, LOW); //Set 0 voltage
delay(1000);
}
