PROJECTSDUNIA

Interfacing SPI TFT with Arduino.

noreply@blogger.com (Sachin) — Wed, 18 Jan 2017 19:10:00 +0000

Hey fellas!

It's been long since our last blog...but worry not! Here I'm back again with something new to try this time around. This blog will let you know how to interface a 1.8 inches SPI TFT with arduino. The task may get a bit tricky if someone just starts without taking a few things in consideration. So here we go!

Now what's with this "SPI" term? Why not just a TFT?

Well, that's because like you all must have known, there are 2 modes of transferring data, SERIAL & PARALLEL. When there are separate multiple data buses for data transfer, that's a Parallel Data Bus TFT or more generally known as a normal TFT. These types of displays will have a comparatively large no. of pins to connect (quite obvious), as 8 or 16 pins are for data bus alone and then the other ones too.

They generally take up all the space on an UNO or even may require a shield as well.

When there is a single data bus to transfer all the data, all the data is streamlined in a series and then pushed towards the receiving end. This type of TFT is called an SPI TFT, where SPI stands for SERIAL PERIPHERAL INTERFACE. Now we know what that un-abbreviated form says!

Also remember that this 1.8 inches SPI TFT has different pin connections on an UNO (or similar) board and the MEGA board. On MEGA, the SPI pins lie at 50,51,52 and 53.

First of all, list of required items is as follows:

* Arduino UNO (or similar) x 1

* 1k ohm resistances x 5

* One-2-One connectors x 8

The TFT library comes pre-installed in Arduino version 1.0.5 and later.

Make the connections as mentioned below-

Reset	8
Dc (A0)	9
Cs	10
SDA	11 (UNO) or 51 (MEGA)
SCL	13 (UNO) or 52 (MEGA)
BKL	3.3v
Vcc	5v
Gnd	Gnd

Now instead of making the first 5 connections directly to Arduino, put a resistor of 1k or similar value between the TFT pin and the Arduino pin. That’s because the IO ports are 3.3v tolerant while the Vcc required is 5v. It is quite possible because of it’s non-standard chinese manufacturing.

Now, open the IDE and run the any sketch except the “BitmapLogo”. This sketch uses the SD card function and requires you to hook up the TFT with an SD card as well, which is definitely not a part of this article.

I’m putting a demo sketch that I ran successfully-

#include <TFT.h> // Arduino LCD library
#include <SPI.h>

// pin definition for the Uno
#define cs 10
#define dc 9
#define rst 8

// pin definition for the Leonardo
// #define cs 7
// #define dc 0
// #define rst 1

// create an instance of the library
TFT TFTscreen = TFT(cs, dc, rst);

// char array to print to the screen
char sensorPrintout[4];

void setup() {

// Put this line at the beginning of every sketch that uses the GLCD:
TFTscreen.begin();

// clear the screen with a black background
TFTscreen.background(0, 0, 0);

// write the static text to the screen
// set the font color to white
TFTscreen.stroke(255, 255, 255);
// set the font size
TFTscreen.setTextSize(2);
// write the text to the top left corner of the screen
TFTscreen.stroke(255, 0, 0);
TFTscreen.text("IoT Freaks!\n ", 20, 0);
TFTscreen.stroke(0, 255, 255);
TFTscreen.text("Sensor value\n ", 12, 25);
// ste the font size very large for the loop

}

void loop() {

// Read the value of the sensor on A0
String sensorVal = String(analogRead(A0));

// convert the reading to a char array
sensorVal.toCharArray(sensorPrintout, 4);

TFTscreen.stroke(255, 255, 0);
TFTscreen.setTextSize(5);
TFTscreen.text(sensorPrintout, 34, 50);
delay(550);
TFTscreen.stroke(0, 0, 0);
TFTscreen.text(sensorPrintout, 34, 50);
}

This sketch requires a sensor at pin A0 to read it's value and then display it as text on the TFT. So put any analog value sensor such as a potentiometer, an LDR, an IR pair or whatever you have.

Viola! I’m pretty much sure you’ll have it done then……

Be sure to buy the stuff mentioned in this blog by clicking on the link below-
http://www.ebay.in/usr/4d_innovations?_trksid=p2053788.m1543.l2754

The vendor's offering interesting and working hardware at quite handy rates. Go give it a try! :)

So until my next blog, this is it. As always, any problem you face and wish to discuss it, the comment boxes are always down there and you can reach me as well at iotfreaks@gmail.com.

For more of these interesting stuff, like my page-
https://www.facebook.com/iotfreaks/

And our community,
https://www.facebook.com/projectsdunia/

How To Interface PIR Sensor With Arduino

noreply@blogger.com (Sachin) — Fri, 19 Feb 2016 11:22:00 +0000

Hello Arduinians... Ever thought of detecting motion via your Arduino.... if yes, then this one's for you. In this tutorial, We're interfacing PIR sensor today with Arduino. Let's gets started!

Block Diagram

Components Required For This Tutorials

1 * Arduino Board
1 * PIR Motion Sensor(you can buy from here)
Breadboard
Jumper wires
Battery

What is PIR motion sensor & how it works?

Basically, a PIR stands for "Passive Infrared Sensor". The sensor works on the principle of infrared waves' detection those are being emitted by human bodies. They are undetectable to us but can be discovered by the devices designed for such special purposes. I'm going to go just a little deep, enough to make you understand the internal operation.

When a body moves in front of a PIR sensor, the temperature of that place changes where the body has moved. If the body makes a further movement, the composition of infrared waves being received by the PIR from that region changes and since the reading is not the same as last reading, it generates a signal for the microcontroller and we work on it accordingly.

Arduino Distance Measurement Using Ultrasonic Sensor

How To Interface LDR With Arduino

Circuit Diagram

We can easily interface PIR motion sensor with Arduino-like our other sensor. But it all depends on our logic of the code, how efficiently do we want to detect motion through it.

A PIR has 3 pins, just like any other sensor, Vcc, Signal & Ground pin. A very simple circuit of interfacing PIR motion sensor with Arduino is shown below

Circuit

PIR Motion Sensor

The 2 knobs are there too. One for adjusting sensitivity by increasing or decreasing the range of motion detection and another one for response delay. If you're using PIR in your home security, I strongly suggest you set the range at maximum (towards right). However, the detection range offered by a PIR sensor is good enough, like about 6 metres as I've tested it successfully.

Source Code

Here is a very simple code for this tutorial which only detects if there is ANY motion and triggers an LED for confirmation.Write below code into Arduino IDE and compile it.

int pirSensor=5; // connect sensor at pin 5

int led=13; // connect led at pin 13

void setup()

{

Serial.begin(9600); // initialize serial

pinMode(led, OUTPUT); // initialize led as output

pinMode(pirSensor, INPUT); // initialize sensor as input

}

void loop()

{

int sensorValue = digitalRead(sensor); // read sensor value

Serial.println(sensorValue); // print sensor value

delay(100); // delay 100 miliseconds

if(sensorValue > 600)

{ digitalWrite(led,HIGH); }

}

Now you can connect the signal pin to any analog pin also but for that, you'll have to check what values do you get on the serial monitor and which value do you wish to use as a threshold for triggering any LED, buzzer, etc.

Note that the sensor first takes some time for its calibration and after that it starts detecting motion. If any motion is detected, it triggers the LED on Arduino board and keeps searching for the motion for a certain amount of time. It only settles low if there is no further motion detected for that given search period (which can be changed in code). Giving a search window to your sensor, makes it's working more efficient and there are better chances for you to get non-erroneous functioning.

I too did both codes and both worked fine for me. Here's a snap!

Demo

So that's an end to our tutorial for this time. Hope you enjoyed reading. If you liked this tutorial then don't forget it to share with your friends. I'll be back with more..... till then #happyDIYing

If you have any question or query or feedback regarding this tutorial then leave a comment below and we will solve those as soon as possible.

Be sure to buy the stuff mentioned in this blog by clicking on the link below-
http://www.ebay.in/usr/4d_innovations?_trksid=p2053788.m1543.l2754

The vendor's offering interesting and working hardware at quite handy rates. Go give it a try! :)

Learn How To Make A Digital Voltmeter Using Arduino

noreply@blogger.com (Sachin) — Tue, 09 Feb 2016 17:31:00 +0000

Arduino is very popular and easy to use. With Arduino, we can do lot's of projects and experiment. So today we add one more projects in our Arduino project list. In this article, we are going to make a digital voltmeter.using an Arduino board. In this project, we measure the input voltage range between 0 to 50V by using the voltage divider. It is very simple to use Arduino as a voltmeter. Arduino UNO has 5 analog pin to read the input analog value. If we have an idea about reference voltage then we can easily measure the input voltage. Here we will use 5V as a reference voltage.

Block Diagram

Block Diagram of DC Voltmeter

Component Required

1 * Arduino Board(In this article we use Arduino UNO)
1 * LCD Module(Here we will use 16 * 2 LCD Module)
1 * 100K Resistor
1* 10K Resistor
1 * 5K Potentiometer
Some jumper wires
Breadboard

Circuit Diagram

Circuit diagram of this projects is very simple and easy to understand. Here we use a 16 * 2 LCD module to display the voltage. Read this article to learn How To Interface LCD With Arduino UNO.

Circuit Diagram

A voltage divider circuit is used here to divide the input voltage by the range of Arduino board. As we all know that Arduino is compatible with till 5v only. Above this voltage, our Arduino may be damaged.

Analog input pin on the Arduino board measure the input voltage and convert it into digital format by using inbuilt ADC(analog to digital converter) that can be processed by Arduino and then display it on LCD. In this project, we fed input voltage to analog pin A0 of Arduino by using the voltage divider circuit. A simple voltage divider circuit is made by using one 100kohm and one 10kohm resistor to make the 1:11 divider. Thus, by using this voltage divider circuit we can measure the voltage up to 55V.

Voltage divider output Vout = Vin * ( R2/(R1+R2) )

It is good if you use this voltmeter project to measure the voltage within range 0v to 35v. Because large voltage may be damaged your Arduino board.

Code

In this project, we use inbuilt liquid crystal library for the display of voltage value and analogRead() function to read the input voltage at the analog pin A0. Here our reference voltage is 5V, hence we multiply read value with 5 and then divide it with 1024 to obtain the actual voltage. Then by using the voltage divider formula we can decrease this value within the range of Arduino board voltage.

Video Demonstration

A Guide For Interfacing Analog Sensors With Arduino

noreply@blogger.com (Sachin) — Mon, 01 Feb 2016 09:52:00 +0000

With Arduino, almost everything seems to be too friendly when it comes to interfacing various sensors, shields, add-ons or any other utility devices. Just because the Arduino coding environment is so user-friendly, anyone can do it. So in this post, I will just show you how to hook up your sensors to Arduino and get them running. Let's start with the very basics....

Sensors

What is Sensor

Sensors are those electronic components which convert physical data into electronic data. This data is in analog format and is fed to the microcontroller on the Arduino board. The microcontroller has inbuilt ADCs (Analog-2-Digital Converter) which processes this data and converts it into digital format.

And once you have received the (electronically converted) physical data, you can make your Arduino perform as you want.

How To Interface LDR With Arduino

Arduino Distance Measurement Using Ultrasonic Sensor

On your Arduino board, there are analog pins named as A0, A1, A2, A3, A4, A5. The number of these pins may vary depending on your Arduino board. For UNO, there are only 6 analog pins while for MEGA there are 16. And remember this thing, any sensor (or other components) that gives analog data and you wish to process it, you'll have to connect it to your analog pins only. For now, I would say SENSORS would always be connected to analog pins.

Connection of Analog Sensor with Arduino
All sensors have their own method to connect with Arduino. Some of them need pull-up resistors, some need a certain power supply to use them. But any sensor has generally 3 pins to connect to Arduino or other development board. These pins are.

1. +Vcc

2. Signal

3. Gnd

Hook up the +Vcc to 5v (or 3.3v if sensor demands it) on your Arduino board.

Connect the Gnd pin to Ground pin on your Arduino.

Connect the Signal pin to any of your Arduino's analog pins. In our case, say A1.

Code for Interfacing Analog Sensor with Arduino

Below code is general code for interfacing analog sensors with Arduino. Write this code in your Arduino IDE to start playing with analog sensors.

void setup()

{

Serial.begin(9600); // initialize serial communication at 9600 bits per second:

}

void loop()

{

int sensorValue = analogRead(A1); // read the input on analog pin 1:

Serial.println(sensorValue); // print out the value you read:

delay(1); //this delay in between reads for stability

}

After burning this code to your Arduino, open the serial monitor and see the analog-2-digital converted data on your serial terminal. Basically, it is 10-bit data since the inbuilt ADC of your Arduino is a 10bit ADC.You will get the reading on your serial monitor.

That's all for now. Hope you got everything out of that blog.I'll try to bring something new next time. Till then........ keep learning and keep prototyping.

If You have got any problem or feedback then comment below. I will be right back to you soon.

Be sure to buy the stuff mentioned in this blog by clicking on the link below-

http://www.ebay.in/usr/4d_innovations?_trksid=p2053788.m1543.l2754

The vendor's offering interesting and working hardware at quite handy rates. Go give it a try! :)

Automatic Street Light Controller Circuit Using LDR And 555 Timer IC

noreply@blogger.com (Sachin) — Fri, 27 Nov 2015 13:10:00 +0000

We are living in the world where everything goes to be automatic from your washing machine to your ceiling fan. Street lights are one of those examples of the automatic world. Automatic street light are those light which needs no manual operation to gets turn ON and turn OFF. Did you ever try to make such kind of street lights that gets turn ON and turns OFF automatically? In this article, we are going to make automatic street light using LDR and 555 timer IC.

List of Components

555 Timer IC
LDR
LED
Potentiometer
Resistor 1* 1k ohm
Resistor 1* 220 ohm
9V Battery
Printed Circuit Board(PCB) Or BreadBoard

Circuit Diagram

A very simple circuit diagram of automatic street light is given below.

Automatic Street Light Controller Circuit

Principle and Working of Automatic Street Light Controller

555 Timer IC is the main part of the circuit that works as a comparator. All the working of this circuit depends on the working of the 555 timers Ic.To know more about 555 times IC read this article Working of 555 Timer IC. In this circuit pin, 3 produce output which has just two states high and low. Output goes to high when trigger pin is at a lower level than the 1/3rd level of the power supply voltage and output goes low when trigger pin 2 is at above then 1/3rd of the power supply voltage. In this circuit pin, 4,6 and 8 are connected to the power supply. Here we use LDR to detect the presence of light which is formed a potential divider circuit with the help of 1k ohms resistor. LDR is a special type of resistor whose value depends on the light. Read this article to know How LDR Works. The output of this divider circuit is given to trigger pin of the 555 timer IC.

In this circuit, we use a simple LED to know how the whole circuit works. You can also connect as much led as you want by using the transistor or you can connect a Relay to control high voltage electrical bulbs.

You must use caution while connecting Relay to this circuit because its may be danger and as different bulb have different wattage.

Video Demonstration of Automatic Street Light Controller

Atmel AVR Studio - Download and Install

noreply@blogger.com (Sachin) — Sat, 21 Nov 2015 18:02:00 +0000

In the previous article, we learn why AVR microcontrollers are so popular for designing embedded system projects. We have got the basic knowledge of ATmega16 Pin description and other required data through its datasheet. Now we can move forward to code our microcontroller. So In this article, we are going to install and setup the Atmel studio.

Source: ATMEL

HOW TO INSTALL ATMEL STUDIO

Those who have been using an earlier version of Atmel studio can realize that there are not so much difference between the new version of Atmel studio except the awesome UI. To download the atmel studio first you have to go to the atmel website or simply click here. There you may see two option for downloading atmel studio like this:

Software Description

1 Atmel studio (latest version name) eg. Atmel studio 7.0 (build 634) web installer (recommended)

2.38 MB, Required internet access during installation

2 Atmel studio 7.0 (build 634) offline installer

734 MB, No internet access required during installation

Click any one option that you want to install and register your email id as a guest user or create an atmel account. Now go to your email account and click on the download link send by atmel.

After downloading is completed then double-click on the installation file to install atmel studio. If you have got already installed Visual Studio then it will not install or if you do not have visual studio install on your desktop then first it install it. Now you just click on next button till installation won't be finished.

When visual studio installation is completed then it installs atmel studio.Accept the terms of the license and click next.

Now click next once again as shown.

Now once again click on next button and installing will start as shown.

Now wait for a while and click on finish button in next dialogue box. Now atmel studio installation is completed and atmel studio will be installed on your desktop.

Now you have successfully completed installation of atmel studio and ready to code your AVR microcontroller. In the next article, we set up the atmel studio to write our first code for AVR microcontroller. Hope you like this article and if you have got any problem then comment below.

AVR Microcontroller ATmega16 - An Introduction

noreply@blogger.com (Sachin) — Thu, 19 Nov 2015 16:30:00 +0000

ATMEL AVR microcontrollers are very popular among Engineers,Students and Hobbyist for designing mid range embedded system projects. All embedded system needs brain that receives external signal, interprets it and perform a set of task accordingly. AVR microcontroller are best option for this purpose because AVR microcontroller have powerful instruction set and have high speed.In this article we'll discuss the basic of ATMEL ATmega16 microcontroller.

WHICH AVR I USE

AVR Features

ATMEL AVR microcontrollers are available in the market in many varieties. But most popular and used AVR microcontrollers are ATmega8, Atmega16 and ATmega32. All these microcontrollers are belongs to ATMEL mega family. There are no difference between avr microcontroller. They only differs in memory size and Price.
Nomenclature of Atmega uCs

Atmega16 Pin Configuration

Pin Configuration

Pin 10 and 11 : These pins are available for the power supply of uC. Atmega16 works at 5V.

Pin 9 : This pin is used for Reset the uC. It is an active low pin means its gets activated when you give it high signal.

Pin 30 and 32 : Pin 30 is analog Vcc. Atmega16 has features of analog to digital converter. This pin is used to gives power externally to analog circuit. Pin 32 is analog reference pin. This pin is also used for ADC purpose.

Pin 12 and 13 : By default ATmega26 works at 1 MHz internal frequency. We used this pin to connect an external crystal oscillator for getting higher frequency and clock pulses.

Pin 1-8 (PORT B) : These 8 pin of ATmega16 uC are known as PORTB. These pins are I/O pin that means all pins are capable of getting input as well as giving output.

Pin 33-40(PORT A) : These pins are known as PORTA. PORTA can be used for ADC purpose. If PORTA is not used for ADC purpose then its serves as 8-bit bidirectional I/O PORT.

Pin 22-29(PORT C) : This is 8-bit bidirectional I/O port known as PORT C. All pins of PORT C have internal pull-up resisters.

Pin 14-21 (PORT D) : This is also 8-bit bidirectional I/O port with internal pull-up resistors. PORTD also has some additional features for serial communication, interprets, PWM and timer.

Datasheet:

Now we have got some basic knowledge about Atmega16 uC. If you want to learn anything else about the ATmega16 uC then you can refer to its Datasheet. Datasheet contains all the information about uC like its behavior,bit setting, actual working etc.

Arduino Distance Measurement Using Ultrasonic Sensor

noreply@blogger.com (Sachin) — Mon, 21 Sep 2015 09:03:00 +0000

We all know about the ultrasonic sensor and also wanted to play with it, but don't know how ultrasonic sensor works. So In this article, we will see how to use an ultrasonic sensor with your projects. The ultrasonic sensor is very popular among arduino hobbyist and there are so many projects which you will be able to do at the end of this article.

Description of HC-SR04 Ultrasonic Sensor

Ultrasonic Sensor can measure the distance from 1" to 13 feet( 1 cm to up to 4metre) with accuracy up to 3mm. A hc-sr04 ultrasonic sensor has 4 pin GND, VCC, Echo and Trigger Pin. Trig pin generate an ultrasound by setting trig pin on the high state of 10 microseconds. Echo pin produce an output in a microsecond when ultrasound returns back from the object to echo pin.

We can calculate the distance by using simple formula Speed=(Distance/Time). The speed of the sound is 340m/s and thus by calculating ultrasound travel time we can calculate the object distance from the ultrasonic sensor.

Required Components

1 Arduino UNO board( Buy from here Arduino )
1 HC-SR04 ultrasonic sensor ( Buy from here sensor )
Jumper wire
Breadboard

How To Interface LDR With Arduino

Circuit Diagram

Ultrasonic sensor pin connected to arduino pin in a very simple manner as shown in the image below. Here we use a voltmeter as a reference because we can't place a real object before the LDR. So when we increase or decrease the voltage level of voltmeter then its corresponding value also changed.

Arduino Ultrasonic sensor

Vcc Vcc

Pin 5 Trig

Pin 4 Echo

Gnd GND

Circuit

Source code

Here first we define the trig pin and echo pin of the ultrasonic sensor and they are pin no 5 and pin no 4 respectively. Here we define Trig pin as output and Echo pin as an input. After that, we defined three long variable name duration, cm and inches. In the loop first we set the Trig pin Low for few microsecond and after that, we set it in the high state for 10 microseconds. We read the travel time by ultrasound by using the pulseIn() function.

Source Code

For getting the exact distance we multiply .034 in duration and then divide it by 2 because ultrasound travels forward and backward. At the end we use Serial.print() function to print the value in the virtual terminal.You can download the source code by clicking on the link.

Video Demonstration

Hope you like this tutorial on the ultrasonic sensor. If you have got any problem using the ultrasonic sensor or its proteus simulation then feel free to comment below or if you have any suggestion about this tutorials and let me know by your valuable comments.

How to Interface 4*3 Keypad With Arduino

noreply@blogger.com (Sachin) — Mon, 20 Jul 2015 15:16:00 +0000

In this article, we will find out how to interface a matrix keypad with arduino in very easy technique. During this article, we are using a 4*3 matrix keypad. Keypads are a very important component in the embedded system which are used in various mini or major comes and the commercial product like telephone, electronic locker, and alternative automation product. At the end of the article you may be ready to interface a matrix keypad together with your arduino and after you press a key, its shows up into the serial monitor.

What is 4*3 Matrix Keypad

One of the most frequently asked question among the students or hobbyist are when we use 4*3 or 4*4 matrix keypad and what is the difference between them. Therefore, we have only one answer what's your requirement within the project. The logic behind operating of each keypad are same. The 4*3 keypad is simple keypad having 4 rows and 3 column, therefore, total 12 keys as shown in the image. There are so many distributors wherever you will purchase a keypad otherwise you can purchase from here.

Circuit Diagram

The circuit of interfacing of a keypad with arduino is very simple. You only need to connect rows 1, 2, 3, 4 to digital pin 6, 7, 8, 9 respectively and column 1, 2, 3 are connected to digital pin 10, 11, 12 respectively of the arduino. The circuit is extremely easy to grasp as shown in the below image.

Circuit Diagram

Program

Program of interfacing a keypad with arduino is extremely easy. Here we simply use an if-else statement to check every condition one by one. First we kept row 1 low and check all condition for it and equally with others rows one by one. You can download the source code from here.

SEE THIS ALSO: Interfacing Push Button Switch to Arduino

From here you will display the key on an LCD and build a lot of other cool projects like door lock, calculator, security system enabled projects. Hope you like this article. If you have got any doubt then comment below or have any suggestion then you may be forever welcome to ProjectsDunia.

VIDEO:

555 Timer IC: Introduction, Working and Pin configuration

noreply@blogger.com (Sachin) — Wed, 20 May 2015 12:25:00 +0000

One of the most versatile linear integrated circuit is 555 timer. 555 timer IC was first introduced in early 1970 by Signetics Corporation.555 timer IC is incredibly low cost and popular timing IC that is used by electronics student, hobbyist for generating timing delay and pulses. Mono stabale and astable multi vibrators is that the most correct example of its application. With the exception of this it's conjointly used for oscillations, waveform generators, analog frequency meters, voltage regulators, digital probes, tone generation, frequency divider and lots of others.This device is obtainable as 8-pin mini Dual-in-line package(DIP) or 14 pin Dual-in-line package(DIP) that consist 25 transistor,16 resistors, 2 diode.

PIN CONFIGURATION OF 555 TIMER IC

8-Pin DIP 555 Timer IC

Pin 1: Ground This pin is used to measured the all voltages.

Pin 2: Trigger Negative going pulse is applied to this pin whose dc level is greater than 1/3 times VCC. Thus comparator 2 output goes low. The output remains high as long as trigger terminal is held at low voltage.

Pin 3: Output Output pin is available to connect the load.There are two ways of connecting the load either between pin 3 and ground or between pin 3 and +Vcc pin of 555 timer IC.

Pin 4: Reset 555 timer can be reset by applying a negative pulse to this pin.

Pin 5: control voltage To change the threshold voltage and trigger voltage an external voltage is applied to this pin.

Pin 6: Threshold SR flip flop is reset when voltage at this pin is greater than 2/3 Vcc.

Pin 7: Discharge This pin is directly connected to the collector of transistor.When transistor is off this acts as a open circuit and when transistor is on, acts as a shot circuit.

Pin 8: A Supply voltage is applied to this pin that ranges from +5v to +18v with respect to the ground.

Block Diagram of 555 Timer IC

555 Timer IC Block Diagram

The 555 timer IC work as a mono-stable multi-vibrator and astable multi-vibrator. A voltage divider circuit is internally connected to the Pin 8 and Pin 1 of 555 timer IC. This circuit hold positive non inverting terminal of comparator at 1/3Vcc and negative inverting terminal of comparator at 2/3Vcc. The output from each comparator is connected to the input of the SR Flip-Flop. The output from the SR Flip-flop acts as a switching stage to drive the Load.

555 Timer IC has three operative modes known as:
1: Monostable
2: Astable
3: Bistable

To Know additional concerning 555 IC Click on this 555 Data sheet.

How To Interface Relay With Arduino

noreply@blogger.com (Sachin) — Mon, 04 May 2015 16:07:00 +0000

A Relay is an electromagnetically operated switch. Relays are used to control a circuit. Many relays consist a coil, a yoke, and an armature. When a current is passed through the coil, a magnetic field is induced in the coil which moves the armature and relay start its switching function. A normal relay has NO(normally open), NC(normally connected), COM and coil pin within it. A Simple one channel relay is shown in below image

Relay

Required Components
For designing a relay driver circuit you will need following components

Relay
1N4007 Diode
BC547 Silicon NPN transistor
10K Resistor

Circuit Diagram

A simple relay driver circuit is shown in below image. Here we use an NPN BC547 transistor to drive the relay.Base current ought to be a lot of enough to turn on a transistor. A diode 1N4007 use among the circuit to protect the transistor from damage due to back emf. When relay is in off state, COM pin of

Relay Driver Circuit

a relay is connected to NC(normally connected) pin and when a small current start flows through relay coil then COM pin is connected to NO(normally open) pin.

NOTE: Change +5V to +12V in the circuit

Code for relay testing is same as for blink an LED so learn how to blink an LED and test your relay driver circuit. Now using relay make some more cool projects using arduino like control your AC home appliances, turn ON/OFF a bulb and many more.

Hope you like this article and give your valuable feedback by commenting below or if you have got any problem then also comment below.

How To Interface LDR With Arduino

noreply@blogger.com (Sachin) — Sun, 26 Apr 2015 10:58:00 +0000

Hello, Friends hope all of you playing with your arduino and currently need to try to do another cool projects on arduino. Therefore, this tutorial is for you. During this tutorial, we interface LDR(Light dependent Resister) with the arduino board. It is very simple tutorials for arduino students, hobbyist, and beginners. Before going more we must find out how LDR is dependent on Light.

What is LDR

LDR(Light dependent Resister) or a photoresistor is a light dependent variable resistor that resistance decreases with the increase in the intensity of light. This gives an analog value so that it is connected to an analog pin of arduino board. A simple LDR is shown within the image and to buy an LDR click on the below image

Circuit Diagram

A simple circuit diagram is shown in the image. We won't use LDR directly within the circuit in order that a potential divider circuit is used with a 10K resistor. In this circuit one pin of LDR is connected to Analog pin A0 of arduino UNO and one pin is connected to ground(GND).

LDR Circuit

Source code

Now connect your arduino board together with your PC and upload the given source code into the board. After uploading the code run your program and see the different value in your serial monitor.

LDR Code

Download:

download this file

Watch This Video:

How To Display Custom Characters On LCD Using Arduino

noreply@blogger.com (Sachin) — Wed, 01 Apr 2015 17:23:00 +0000

We all are aware of custom characters used in the various display module.Heart, various style of smileys, arrow are the foremost usually used custom characters. Thus, during this tutorial, we are going to learn how to display custom characters in LCD using arduino UNO board. This project is done by using of arduino UNO board and 16*2 LCD module.

Custom Character Display

It is assumed that reader knows how to interface LCD with arduino and how to install arduino software.We can generate a completely different style of the custom character using the below pixel array shown in the image.

Pixel array

the custom character shown below that is used in our program to generate the smile type character:

{

0b00000,

0b01010,

0b00000,

0b10001,

0b01110,

0b00000,

0b00000

};

Circuit diagram:

Circuit Diagram

Source Code:

Download:

Download all file

Video:

Interfacing Push Button Switch to Arduino

noreply@blogger.com (Sachin) — Thu, 19 Mar 2015 17:28:00 +0000

There are many electronic circuits can be used to interface with the device in the real world using switches as inputs. The simplest type of interfacing device is push button switches due to its low price and simple interfacing with any kind of electronic circuit. Push button switches are widely used in many electronic projects so knowledge of their interfacing is extremely essential in designing projects. So during this article, we learn how to interface push button switches with arduino. I hope you have knowledge about Arduino Board and led interfacing. Push button has four terminal and its allow current to pass through it when you press it down.

Push Button

Here we use PULL-UP or PULL DOWN resistor while using switches. PULL-UP register is a register connected between power supply and connector to give an electricity on certain condition.To understand the working of Pull-UP resistor look the image how its work.

Pull-Up Resister

REED THIS ARTICLE Interfacing LCD With Arduino UNO

Circuit Diagram

Circuit Diagram

Source Code

Download

Download source code and circuit diagram file from here

Video

Arduino-based Automatic Temperature Fan Speed Controller

noreply@blogger.com (Sachin) — Wed, 18 Mar 2015 16:41:00 +0000

In many small or large industry, you may have seen such a lot of fan that speed is control according to the temperature of the place. Thus, during this article, we have presented a demo of that application. It's assumed that you have an idea of how to read reading from the temperature sensor IC. In industry
temperature range will be more than 100 ^oC but here we will work on the very low range.

Block diagram of Temperature control FAN

Block Diagram

Required Components

Arduino UNO board (buy from here arduino )
Temperature sensor IC LM35( buy from here LM35 sensor )
DC Fan
resistor 1* 1K
16*2 LCD Display
Power supply
Diode(1N4007)

Circuit Diagram
In this application, we use an arduino board to control the speed of the fan and a 16*2 LCD display to display the status of the fan. Here we use a diode in parallel with FAN to prevent it from the damage and a 9V battery to provide power to the fan.

Circuit Diagram

Code
Again like our previous projects, code for this projects is also very simple. Here we use an analogRead() function to get the value of temperature sensor and store that value in the variable.When this value will exceed the min_temp value then the fan will start otherwise its always off. Download the file to get the source code of this projects along with its circuit diagram.

Source Code

Download

In the below link you will get all the file required for this projects.

Required file to download

Video Demonstration

How To Make a PC Control Robot

noreply@blogger.com (Sachin) — Wed, 11 Feb 2015 10:40:00 +0000

Do you ever tried to control your robot using your PC or laptop? Controlling a robot using PC or laptop is often being a fun for the student or hobbyist. Thus during this article you will be tend to learn how to control your robot using your PC or laptop. Here it is assumed that you know How To Send Serial Data From Arduino To Laptop or PC and How To Receive and Send Serial Data Using Arduino Board. Thus lets begin to making this awesome DIY hack today with us.

Replica of robot

Component Required:

Arduino UNO Board
PC/Laptop
L293D Motor Driver IC
2 Motor
Serial Bluetooth Module
2 wheels
Chassis
Castor wheel
Software (serial port software on your PC/laptop)

Click here to see more projects on Arduino

Block Diagram:

Block Diagram

Setup Connection For Robot:

Circuit Diagram

Here we use a L293D motor driver IC which is used for the controlling the rotation of the two motor connected to robot. Pin no 2,7,10,15 of L293D motor driver IC is connected to the pin no 9,8,7,6 of arduino board. Output pin 3,6,11,14 of the L293D motor driver IC is connected with the motor as shown within the Circuit Diagram Image.

L293D Motor Driver IC

For the connection of RX and TX read this article How To Receive and Send Serial Data Using Arduino Board

NOTE:- Bluetooth Module should be removed while uploading the code from PC to Arduino board.

Code for PC Controlled Robot:

If you are beginner to arduino then download Arduino IDE from here How To Install Arduino Software On Windows. We use 9600 baud rate for the transmission of the data from PC/Laptop to Robot.Click here to Download the source code for PC controlled robot.

Arduino Code

We can control the robot using the following instruction

'8' = Forward

'2' = Backward

'4' = Move Left

'6' = Move Right

'5' = Stop

Download:

File for PC controlled Robot

Video:

If You have got any problem then be happy to comment in comment box or you can contact us at Facebook or Google+.

Controlling LEDs With PC Using Arduino

noreply@blogger.com (Sachin) — Mon, 09 Feb 2015 08:54:00 +0000

Wireless communication plays a very important role within the communication system. We may be able to send data from one point to another point simply through wireless communication. There is such a large option available for the wireless communication like Bluetooth, Wi-Fi etc. In this article, we concern only in Bluetooth. Bluetooth is a standard wireless technology which transfers the information over very short distances. It is assumed that you just ought to knowledge to How To Send Serial Data From Arduino To Laptop or PC and How To Receive and Send Serial Data Using Arduino Board

After Reading this article you will be able to control LED via your PC/Laptop. For controlling the led we use arduino board Introduction to Arduino Board.

Circuit diagram:

Here we use three led blue, green and red that are connected to pin no. 10,9 and 8 of arduino board respectively. We also connect an LCD display module to arduino board. read this post for Interfacing LCD With Arduino UNO. All other connection for controlling led via PC is shown below image

Circuit Diagram

Program:

// ProjectsDunia
// http://projectsdunia.blogspot.in
// Our Facebook Page http://facebook.com/projectsdunia

// control LED with your PC

#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int blue_led=10;
int green_led=9;
int red_led=8;
int store=0;
void setup()
{
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// initialize the serial communications:
Serial.begin(9600);
pinMode(blue_led, OUTPUT);
pinMode(green_led, OUTPUT);
pinMode(red_led, OUTPUT);
}
void loop()
{
// when characters arrive over the serial port...
if (Serial.available())
{
// save the data
store=Serial.read();
switch(store)
{
case '1':
lcd.clear();
digitalWrite(blue_led,HIGH);
lcd.write(" Blue_LED ON ");
break;
case '2':
lcd.clear();
digitalWrite(blue_led,LOW);
lcd.write(" Blue_LED OFF ");
break;
case '3':
lcd.clear();
digitalWrite(green_led,HIGH);
lcd.write(" Green_LED ON ");
break;
case '4':
lcd.clear();
digitalWrite(green_led,LOW);
lcd.write(" Green_LED OFF ");
break;
case '5':
lcd.clear();
digitalWrite(red_led,HIGH);
lcd.write(" Red_LED ON ");
break;
case '6':
lcd.clear();
digitalWrite(red_led,LOW);
lcd.write(" Red_LED OFF ");
break;

}
}
}

Download:

LED control file

Video:

If you have any question, leave a comment below, Thanks for reading this article.If you like this article then support us by subscribing our youtube channel and like our facebook page.

How To Receive and Send Serial Data Using Arduino Board

noreply@blogger.com (Sachin) — Fri, 06 Feb 2015 21:10:00 +0000

Serial communication is the easiest way to communicate with the peripheral device in embedded system. Thus, during this article, you may be able to learn the way to receive and send serial data from the arduino board. If you are beginner then first read this Introduction to Arduino Board and How To Send Serial Data From Arduino To Laptop or PC before moving on this article.

Arduino ide has such a big amount of inbuilt function for serial communication and detail of some function are here How To Send Serial Data From Arduino To Laptop or PC. During this article, we tend to use some additional function that facilitates us to receive the serial data from the serial port. These functions are Serial.available(), Serial.read(), Serial.write whose explanation are given below:

1: Serial.available()

This function is always used before the Serial.read() function. This function returns always a positive value once reception is complete. This function is used for whether or not entire data is received.

2: Serial.read()

This function is used to read the received data from the serial port. We will save received data in any variable for any condition to ascertain.The variable could also be integer or character.

3: Serial.write()

This function is same as Serial.print() and Serial.println() explained in How To Send Serial Data From Arduino To Laptop or PC. This function returns the data to the serial port of the arduino.

Circuit diagram:

Circuit Diagram

Code:

Code

Download:

File for download

Video:

If you have got any question concerning this article then be happy to comment below or contact us via social network like facebook

How To Send Serial Data From Arduino To Laptop or PC

noreply@blogger.com (Sachin) — Thu, 05 Feb 2015 17:15:00 +0000

Serial Communication plays important role within the communication system. All micro-controller should have serial communication port.Serial communication provides a text-user-interface(TUI). One will use serial port of microcontroller to send data serially to laptop/PC or receive data serially from laptop/PC.Here we use arduino board to communicate with the laptop. Arduino board have a minimum of one serial port to communicate known as UART and USART. It communicates with digital pin 0 and 1 of arduino refer to as RX and TX pin as well as with the computer via USB.

Virtual Terminal

Interfacing LCD With Arduino UNO

Arduino has a built-in function for serial port thus there is no need to go into register detail. In Arduino IDE, one can easily call the serial function for the serial port and job is finished. A simple connection for serial communication is shown below

Connection For Serial Communication

For serial communication with arduino, we have to use three function known as Serial.begin(), Serial.print(),Serial.println(). Their function is as follows

1: Serial.begin()

To initialize the serial port for the communication we use this function.In this function baud rate is used to initialize the serial port. Here we have used 9600 baud rate for the communication.

Interfacing Seven Segment Display With Arduino

2: Serial.print()

This function helps to send serial data to the device connected to the serial port of arduino board. Using this function we are able to send both ASCII and string to the device.

3: Serial.println()

This function is used to print the send data into a new line and all the function is same as the previous function.

Circuit diagram:

Circuit Diagram

Code:

Download the hex file from below.this image is just for showing. we connected a led to pin no 5 of arduino board therefore whenever data is sent to laptop/PC led can blink.

Code

Download:

Serial Port file

Digital Thermometer With Arduino Uno and Temperature Sensor IC LM35

Video:

How To Interface Seven Segment Display With Arduino

noreply@blogger.com (Sachin) — Mon, 02 Feb 2015 22:16:00 +0000

A seven segment display is an electronic display device for displaying numeral. Seven segment display are widely used in the digital clock, TV, electronic meter and other electronic devices which display numerical value. Simple seven segment display image is shown below:

Seven-segment Display may be used in two modes:

1: Common anode ( all of the positive terminal are connected)

2: Common cathode (all of the negative terminal are connected)

In this tutorial, we tend to use common cathode mode to display the numerical number.

Interfacing LCD With Arduino UNO

Circuit diagram

Arduino pin 2,3,4,5,6,7,8,9 is directly connected to a,b,c,d,e,f,g,h data pin of seven segment display as shown in image:

Circuit Diagram

Program

Code for one digit count down timer from nine to zero is written in arduino ide as shown in image.

Code

Copy or download the code and paste it within the empty sketch of arduino ide and so compile the sketch and upload it to your board. Now enjoy count down timer using seven segment display.

Digital Thermometer With Arduino Uno and Temperature Sensor IC LM35

Download

seven segment display files

Video

If you have got any problem then feel free to comment in box or connect us with social media facebook and google+

How to Use A Temperature Sensor With Arduino

noreply@blogger.com (Sachin) — Wed, 28 Jan 2015 15:56:00 +0000

A thermometer is a device measures the temperature. A Thermometer consists a temperature sensing element that senses environment temperature and provides the result to the suitable devices. During this article, you may tend to learn to make a digital thermometer using LM35 temperature sensor and LCD module display.For LCD interfacing with arduino read this article Interfacing LCD With Arduino UNO

LM35 :

LM35 Temperature Sensor

LM35 is a temperature sensor that is employed to measure the temperature. It has three terminal Vcc, Output, Ground as shown in the above image

The range of the LM35 temperature sensor is from -55 'C to +155 'C. The output range varies by 10mV to each fall and rise in temperature. Circuit diagram of Digital Thermometer using LM35 temperature sensor with arduino UNO is shown below:

Automatic Temperature Fan Speed Controller

Circuit diagram

It has a very simple circuit. The output terminal of the sensor is connected to the analog pin A0 of arduino board. Vcc and GND pin of the sensor are connected to the power supply and GND respectively.

Digital Thermometer Circuit Diagram

Program

Code For Digital Thermometer

Download

Digital Thermometer File

Electronics Projects Ideas For Engineering Student

Video

Best Electronics Mini and Major Projects For Engineering Students

noreply@blogger.com (Sachin) — Mon, 26 Jan 2015 22:07:00 +0000

Electronics & Communication(ECE) engineering play a vital role in our daily life. The engineering student is showing a lot of interest in this branch. Within the final year of engineering each student should complete their engineering project with innovative ideas. They need to use their all four-year knowledge on its project. There are so many choices for ECE student for his or her final year projects comes like within the field of embedded, robotics, solar energy, security system etc.

For there purpose here is listed a large number of projects ideas for ECE student. These are collect from numerous sources. If you are interested then you will select any one of below listed projects:

1: Password-Based Circuit Breaker

2: Intensity Control Based Street Light

3: Digital Tachometer

4: Solar Battery charger Circuit

5: Bidirectional Visiting counter

6: RFID Based Attendance System

7: Electrical Load control using PC

8: GSM Controlled Robot

9: GSM Based Security System

10: Fire Alarm with siren sound

CLICK HERE: Arduino-based Automatic Temperature Fan Speed Controller

11: Cell Phone Detector

12: Energy Meter By Wireless Meter

13: Audio Amplifier using 555 Timer Circuit

14: Power Amplifier Circuit

15: Android-Based Home Automation System

16: Frequency Counter Circuit

17: Wireless Mobile Battery Charging

18: Cell Phone Control Home Appliance

19: Fire Fighting Robot Vehicle

20: GSM Based Energy Meter Reading

21: GSM Based Notice Board

22: Automatic Health Monitoring System

23: Touch Screen Based Home Appliance Control

24: GPS Based Vehicle Tracking System

25: Music Equalizer And Visualizer

26: Voice Recognition Based Home Appliance Control

27: Self Balancing Bot

28: Gesture Control Robot

29: E- Glove

30: 3D Laser Scanner

Hope you may be able to find out the basic ideas concerning your final year projects related to embedded system, robotics, solar energy, security system etc. If you have got any question concerning the final year engineering projects then feel free to contact us.

How To Interface LCD With Arduino UNO

noreply@blogger.com (Sachin) — Sun, 25 Jan 2015 16:15:00 +0000

LCD module is incredibly common part at intervals embedded system design.16*2 alphanumeric LCD module is most generally used alphanumeric LCD module at intervals the embedded system. LCD module employed in wide selection of applications well as consumer devices such as DVD player,television,clock,gaming devices and watches.There are 16 pin available and may be operated

in 4-bit and 8-bit mode. Here we have tendency to victimization LCD module in 4-bit mode. The schematics of simple 16*2 LCD module is shown in below image

The name and function of every Pin of LCD module is given below:

Pin1(Vss): Ground pin of LCD Module

Pin2(Vdd): +5v supply is given to this pin

Pin3(Vee): Adjust contrast of LCD. +5v supply is given for full contrast.

Blink Multiple LED Simultaneously Using Arduino

Pin4(RS): Resister select pin in LCD module. There are two register command register and data register. Logic High for data register and Logic Low for command register.

Pin5(R/W): Read/write modes.Logic High for read mode and Logic low for write mode.

Pin(E): Enable pin. This pin for enabling LCD module.

If you don't have LCD module then you can purchase from here at very cheat price LCD

Pin7(DB0) to Pin14(DB7): Data pins. command and data are put on this mode.

Pin15(LED+): Anode of back light led.

Pin16(LED-): Cathode of back light led.

Circuit Diagram

Program

Code

Library function "liquidcrystal.h" is employed for displaying character on LCD module. It is available in the arduino example and accessed through the "Import Library" within the sketch tab of the arduino ide.

Download:

LCD Interfacing File

How to Install An Arduino Library For Proteus

Video Demonstration

How To Blink a LED Using Arduino

noreply@blogger.com (Sachin) — Fri, 23 Jan 2015 15:22:00 +0000

LED is Light Emitting Diode play a really necessary role within the embedded system design. A Diode is a two terminal component within which current flow from the positive direction to negative direction. During this article, we tend to find out how to interface an LED with an Arduino. Simple LED is shown in the image.

LED

In this tutorial, I will able to show you to run three LED at the same time using your Arduino board.

Component Required:

Arduino UNO Board
3 LED
Wire
Power Supply

How to Install An Arduino Library For Proteus

Circuit diagram:

Circuit diagram of interfacing LED with Arduino board for running three led at the same time is shown below:

Circuit Diagram

NOTE: Add a current limiting register in series with led to prevent it from damage.

Positive(anode) terminal of the LED is connected to the 11,12 and 13 pin( digital pin) of the Arduino board as shown within the circuit diagram. Negative terminal of the LED is connected to the Ground.The code is written within the Arduino IDE as shown in below:

Code

How To Install Proteus Software On Windows

About the program:

In this program we tend to use three digital pin 11, 12 and 13 of the Arduino board that are name as x,y,z respectively. The "void setup()" function runs once at a time within the program. In this function we tell to program that led is connected as output using the "pinMode" keyword. second function "void loop()" within the program runs over and over repeatedly.In this function we tend to write our desired code for the Arduino board.

Download:

Arduino LED File

Video:

How to Install An Arduino Library For Proteus

noreply@blogger.com (Sachin) — Wed, 21 Jan 2015 17:52:00 +0000

Arduino is a terribly famed microcontroller board. Each engineer, student or hobbyist needs to verify it projects design in real time environment before assembling it on real hardware. Proteus is that the initial alternative for this however in Proteus software there's no library available for the Arduino.

Therefore, during this article, you find out how to verify your Arduino project in Proteus by using the Arduino library.

First of all, you have got to download the Arduino library for the Proteus software. For this, you will be able to search on Google or download from here.
After downloading the file extract the .rar file and copy the two file name as Arduino.idx and Arduino.lib
Now paste the copied file in the subsequent path

Drive C >> Program files >> Labcentre Electronics>> Proteus 7 Professional>>Library

If you want to buy an Arduino development board then you can buy your first Arduino board from here ARDUINO

Now open Proteus software and search for the arduino within the pick device wizard.You will see the subsequent image

Now you will be able to verify your projects code and circuit supported the arduino board by victimization the Proteus software. If you got any problem then be happy to write down within the below comment box or by connecting to this blog on varied social media pages.

How To Install Proteus Software On Windows

DOWNLOAD

Arduino Library