Skip to main content

Controlling Brightness of a LED



In this tutorial, we will learn how to control the brightness of a LED without using any sensors.

Since we all know how a LED works and what all can be done with it let us start the tutorial.

For those of you who are new kindly refer our previous blogs to explore LED’s. 


Components required

  • Led                                      1No.
  • Arduino UNO                        1No.
  • Few connecting wires.

The circuit connection is very simple just connect the anode of the Led with the 11th pin of Arduino and connect the cathode with the ground.

After making the connections dump the code given below.

int  i;
void setup()
{
}
void loop() {
for (i = 0; i < 256; i++)
{
analogWrite(11, i);
delay(10);
}
for (i = 256; i >0 ; i--)
{
analogWrite(11, i);
delay(10);
}
}



You will observe the output as:


Thinking?
Join our hands-on training courses.
To know more visit us at: http://www.sudolearn.com/

Comments

Popular posts from this blog

IoT - LPG Gas Sensor Logging with NodeMCU and Thingspeak.

In this tutorial, will learn, how to interface MQ-5 Module with Node Mcu(ESP8266).

The Grove - Gas Sensor(MQ5) module is useful for gas leakage detection (in home and industry). It is suitable for detecting H2, LPG, CH4, CO, Alcohol. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity of the sensor can be adjusted by using the potentiometer.


Components Required
NodeMcu(ESP8266) MQ-5 LPG SENSOR Module Few male to female connecting wires Breadboard  Follow the image below for circuit connection reference:-
After making the circuit dump the code given below:-

// Karkhana Report
// Analyse the volume of the gas using thingspeak.com
// Hardware: NodeMCU,MQ-5

#include <ESP8266WiFi.h>
String apiKey = "Enter the API key"; // Enter your Write API key from ThingSpeak
const char *ssid = "Enter ssid"; // replace with your wifi ssid and wpa2 key
const char *pass = "Enter password";
const char* server = &qu…

IoT - Humidity and Temperature Logging using NodeMCU and ThingSpeak

Hey Folks,
In this tutorial, we will learn, how to interface DHT 11 with Node Mcu(ESP8266).
The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed).




Components Required
NodeMcu(ESP8266) DHT 11 SENSOR Few male to female connecting wires Breadboard
Follow the image below for circuit connection reference.
In this circuit, we have connected the output pin to the D3 pin of the NodeMcu module and NC pin remain disconnected. After making the circuit dump the code given below.
// Karkhana Report
// temperature and humidity data using thingspeak.com
// Hardware: NodeMCU,DHT11
#include <DHT.h> // Including library for dht
#include <ESP8266WiFi.h>
String apiKey = "THINGSPEAK API KEY"; // Enter your Write API key from ThingSpeak
const char *ssid = "ENTER YOUR SSID"; // replace with your wifi ssid a…

Servo Motor Control using ESP8266 and Blynk App

Hey folks, 
In this tutorial we will learn how to interface Servo motor with NodeMcu(ESP8266)module and operate it with the Blynk app. Servos are controlled by sending an electrical pulse of variable width, or pulse width modulation (PWM), through the control wire. There is a minimum pulse, a maximum pulse, and a repetition rate. A servo motor can usually only turn 90° in either direction for a total of 180° movement.
   Follow the image below for circuit connection reference. In this circuit, we have connected the output pin to the D0 pin of the NodeMcu module. If want to control the servo motor manually then connect a 10K potetiometer . The 10K potentiometer will work as a voltage divisor, changing the analog input level on  NodeMCU (A0) from 0 to 3.3V. Internally, the 10 bits ADC (Analog-Digital converter) will generate a digital value (from 0 to 1023), the PotReading, equivalent to the analog voltage input.
After making the circuit dump the code given below.
/*NodeMCU */
#include <ESP…