Latest Electronics Projects and Circuits

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  RFID Based Attendance System using 8051

  In this RFID based Attendance System project, we will explain you how can we count attendance automatically by using RFID cards. RFID Tecnology (Radio Frequency Identification and Detection) is commonly used in schools, colleges, office and stations for various purposes to automatically keep a track of people.  Here we will count the attendance of an authorised person by using RFID.

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  Fire Alarm System using AVR

  In this project, we are going to make a Fire Alert System using ATMEGA8 microcontroller and fire sensor. Fire sensor can be of any type, however we are using IR (Infrared) based Fire Sensor. Although IR based Fire Sensors have some disadvantages mostly of inaccuracy, it is the cheapest and easiest way to detect fire.
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  Digital Code Lock using Arduino

  Security is a major concern in our day to day life, and digital locks have became an important part of these security systems. One such digital code lock is imitated in this project using arduino board and a matrix keypad. 
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  Remote Controlled Light Switch

  IR LED emits infrared light, and used in TV remotes. This Infrared is received by the receiver TSOP17XX (TSOP 1738used in TV). TSOP17XX receives the modulated Infrared waves and changes its output. TSOP is available in many frequency ranges like TSOP1730, TSOP1738, TSOP1740 etc. Last two digits represent the frequency (in Khz) of modulated IR rays, on which TSOP responds. Like for example TSOP1738 reacts when it receives the IR radiation modulated at 38Khz. TSOP output is active low, means it becomes LOW when IR is detected.
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  Color Detector using Arduino

  In this project we are going to interface TCS320 color sensor with Arduino UNO. TCS320 is a color sensor which can detect any number of colors with right programming. TCS230 contains RGB (Red Green Blue) arrays. As shown in figure on microscopic level one can see the square boxes inside the eye on sensor. These square boxes are arrays of RGB matrix. Each of these boxes contain Three sensors, One is for sensing RED light intensity, One is for sensing GREEN light intensity and the last in for sensing BLUE light intensity.
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  Arduino Based Digital Clock with Alarm

  This Arduino based Real time clock is a digital clock to display real time using a RTC IC DS1307which works on I2C protocol. Real time clock means it runs even after power failure. When power is reconnected, it displays the real time inrespective to the time and duration it was in off state. In this project we have used a 16x2 LCD module to display the time in - (hour, minute, seconds, date, month and year) format.
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  Light Intensity Measurement using LDR and AVR Microcontroller

  In this project we are going to interface LDR with ATMEGA8 microcontroller, and with this we can measure LIGHT INTENSITY in the area. In ATMEGA8, we are going to use 10bit ADC (Analog to Digital Conversion) feature to measure the light intensity.
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  100mA Ammeter using AVR Microcontroller

  In this project we are going to make a low range ammeter using ATMEGA8 microcontroller. In ATMEGA8, we are going use 10bit ADC (Analog to Digital Conversion) feature to do this. Although we have few other ways to get the current parameter from a circuit, we are going to use resistive drop method, because it’s the easiest and simplest way to get current parameter.
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  UART Communication Between Two ATmega8 Microcontrollers

  In this tutorial we are going to establish a serial communication between two ATMEGA8 microcontrollers. The communication established here is UART (Universal Asynchronous Receiver Transmitter) type. By this serial communication data can be shared between two microcontrollers, which is required in various embedded systems.
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  Line Follower Robot using 8051 Microcontroller

  Line follower Robot is a machine which follows a line, it may be a black line or a white line. Basically two types of line follower robots are: one is black line follower which follows black line and second one is white line follower which follows white line. Line follower actually senses the line and run over it. In our previous projects, we have made a black line follower robot using arduino but this time we are going to make white line follower using 8051 microcontroller. In this tutorial, we will also cover how to make a printed circuit board for line follower robot at home in low price. 

Check more interesting projects and circuits here: Electronics Projects

Basic tutorials to get started with arduino

Here are few basic arduino tutorials to learn working with the board.
1. How to blink an LED with Arduino:

ARDUINO UNO is an ATMEGA controller based board designed for electronic engineers and hobbyists. Arduino based program development environment is an easy way to write the program when compared to other environment development programs. Check out the tutorial to learn how to blink an LED with arduino uno board.

2. How to Use ADC in Arduino:  

In this tutorial we are introducing concept of ADC (Analog to Digital Conversion) in ARDUINO UNO. Arduino board has six ADC channels, as show in figure below. Among those any one or all of them can be used as inputs for analog voltage. The Arduino Uno ADC is of 10 bit resolution (so the integer values from (0-(2^10) 1023)). This means that it will map input voltages between 0 and 5 volts into integer values between 0 and 1023. So for every (5/1024= 4.9mV) per unit.

3.  7 Segment Display Interfacing with Arduino:

In this tutorial we are going to interface a seven segment display to ARDUINO UNO. The display counts from 0-9 and resets itself to zero.

4. Interfacing 16x2 LCD with Arduino Uno:

In this tutorial we are going to interface a 16x2 LCD with ARDUINO UNO. Unlike normal development boards interfacing a LCD to a ARDUINO is quite easy. Here we don’t have to worry about data sending and receiving. We just have to define the pin numbers and it will be ready to display data on LCD.

5. Using Shift Register with Arduino:

Now for some applications we need more than 30 pins, say if we want to design a 5x5x5 LED CUBE, so for this we need 5x5+5=30pins. For such cases we use serial to parallel converter chips or shift register. A shift register chip takes data from UNO board serially and gives output in 8 bit parallel configuration.

6. Understanding PWM Concept in Arduino Uno:

Arduino UNO has 6PWM channels, so we can get PWM (variable voltage) at any of these six pins. In this chapter we are going to use PIN3 as PWM output.

7. How to Interface a DC Motor with Arduino Uno: 

Here we are going to interface a DC motor to Arduino UNO and its speed is controlled. This is done by PWM (Pulse Width Modulation). This feature is enabled in UNO to get variable voltage over constant voltage.

For more such basic arduino tutorials and interesting projects, visit circuitdigest.com

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Latest Arduino Based Mini Projects

Here are some interesting and easy arduino based projects:

1. Digital Thermometer
Thermometers are useful apparatus being used since long time for temperature measurement. In this project we have made an Arduino based digital thermometer to display the current ambient temperature and temperature changes on a LCD unit in real time.


2. Line Follower Robot
Line follower Robot is a machine which follows a line, either a black line or white line. Basically there are two types of line follower robots: one is black line follower which follows black line and second is white line follower which follows white line. Line follower actually senses the line and run over it.


3. Digital Alarm Clock
This Arduino based Real time clock is a digital clock to display real time using a RTC IC DS1307 which works on I2C protocol. Real time clock means it runs even after power failure. When power is reconnected, it displays the real time inrespective to the time and duration it was in off state.

4. Digital Tachometer
Tachometer is a RPM counter which counts the no. of rotation per minute. There are two types of tachometer one mechanical and other one is digital. Here we are going to design an Arduino based digital tachometer using IR sensor module to detect object for count rotation of any rotating body.

5. Distance Measurement
Ultrasonic sensors are great tools to measure distance without actual contact and used at several places like water level measurement, distance measurement etc. This is an efficient way to measure small distances precisely. In this project we have used an Ultrasonic Sensor to determine the distance of an obstacle from the sensor.

6. LPG Leakage Detector
While LPG is an essential need of every household, its leakage could lead to a disaster. To alert on LPG leakage and prevent any mishappening there are various products to detect the leakage. Here we have developed an Arduino based LPG gas detector alarm. If gas leakage occurs, this system detects it and makes an alert by buzing the buzzer attached with the circuit. This system is easy to build and anyone who have some knowledge of electronics and programing, can build it.

7. Digital Dice
We all are familiar with dice and often played LUDO or SANP SIDI (Snake & Ladders) game by using dice. Dice is a squire type solid box which contains 6 different numbers on all of its sides. We throw dice on a surface to get a random number while playing the games. In this project we have tried to replicate it with a digital dice using arduino uno board. In place of throwing the dice, here we need to press a button to get a random number between 0 to 6.

Hope you like the above projects. Find here more such arduino based projects here: http://circuitdigest.com/arduino-projects

Dark Detector Circuit Diagram using LDR and 555 Timer IC

Dark detector is an application which detects the light in surrounding with the help of a light dependant resistor (LDR) or also known as photo resisotrs. In this project, a square wave generator is created using 555 timer IC based astable multivibrator, and a LDR is interfacing with it. When there is no light in surrounding, or in this case when room light is switched off, the resistance of LDR is increased which makes the LED glows which is connected with the output IC of circuit.

Check out the circuit diagram of dark detector and explanation at Circuit Digest.