LED Scrolling Display Board Circuit Using AVR Microcontroller

john January 28, 2018 64 Comments
LED Scrolling Display Board This article explains the steps involved in designing a scrolling message LED Display. The following features of the display are explained in the article. Framing Alpha-Numeric characters and special characters Multiplexing the matrices Serial mode of data distribution using shift registers Static text display Scrolling text display Mode selection between static and scrolling Increasing and decreasing the speed of scrolling in real-time This article focuses on displaying a static text on an LED board. The...
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Home Automation Using IR Remote Control

Project: Home Automation Using IR Remote Control

john February 17, 2018 3 Comments
Arduino-Remote Control Home Automation   In this project, we are going to show you how to control home appliances using a TV Remote. This same principle can be applicable in offices and industries as well. The project deals with the automation of four home appliances, like Tube lights, fan, bulbs, and of course TV. To automate them, four relays must be used. The circuit provided below is designed to switch the relays. But to automate and control home appliances, you...
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Noise Cancellation Headphones – How Do They Work?

Cicy Mary Mathew February 16, 2018 2 Comments
Music soothes the soul, and hence one of the most common hobbies amongst all of us is to listen to our favourite list of songs. Gone are the days of music players and walkman, now it is the generation that prefers mobile and tablets to store their playlists. Fine sound quality is what we all thrive for. A new kind of headphones has floated the market these days, known as the active noise cancellation headphones. These headphones claim to...
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Review of Yamaha RX-V681BL A/V Receiver

john January 3, 2018 No Comments
Yamaha RX-V681BL A/V Receiver AV receivers are no less popular than HDTVs in home entertainment segment and with time, technology used in these devices keep getting better. Yamaha is known for making some of the most well performing and feature rich AV receivers. The Yamaha RX-V681 is one such model that offers a good blend of features and performance. This can be a worthy alternative to the models from stables of Sony and Marantz, for sure. Design: Classy &...
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Do you know how RFID wallets work and how to make one yourself?

Cicy Mary Mathew December 21, 2017 No Comments
Shopping around for a new wallet? Then you must have encountered wallets that boast of having RFID blocking technology embedded in them. RFID technology is a fairly new concept in the market and this article will help you understand what it is and how can you make an RFID wallet yourself. First, let’s get you introduced to RFID and credit cards that use them. What is RFID? Radio frequency identification or RFID is a new technology that tracks and...
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DIY: Musical Keyboard Using ATMEGA8 with Tune Record, Save & Playback Options

john December 5, 2017 4 Comments
Musical Keyboard Using ATMEGA8    This article aims at developing a Monophonic (Single note) musical keyboard by generating the musical notes frequencies using a microcontroller (ATMEGA8). The project presented in this article is a 12 Key, Monophonic keyboard with the options To shift between the Higher and lower octaves Play the programmed tunes Record and save new tune in real-time     Frequencies of Musical Notes Taking the Piano as a view point, every key of a Piano has...
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Project: Auto Intensity Control Of Street Light Using Arduino

john February 17, 2018 57 Comments
Auto Intensity Control Of Street Light Using Arduino In this project, I am going to show you how to control the intensity of LED lights according to the time and the light intensity of outer atmosphere. This is an amazing and very useful project because it prevents the wastage of electricity. This project automatically turns on the streetlight at evening and turns off in the morning. It also controls the intensity of light. Light intensity is automatically adjusted according...
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Gesture Controlled Robot Using Raspberry Pi

john November 21, 2017 52 Comments
Gesture Controlled Robot Using Raspberry Pi Have you ever tired of controlling everything with buttons? Thought of controlling something with simple hand movements by sitting on your lazy couch? If yes, then you are at the right site. In this tutorial we are going to control a robot driven by two DC motors by simply using hand movements. There are different kind of sensors to detect your hand movement like flux sensors, Accelerometers and other gravity based sensors. So...
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DIY: Measuring Wheel/Surveyor’s Wheel Using Arduino & Rotary Encoder

john June 6, 2018 7 Comments
DIY: Measuring Wheel/Surveyor’s Wheel Using Arduino & Rotary Encoder A surveyor’s wheel may also be known by other names like: clickwheel, hodometer, waywiser, trundle wheel, measuring wheel or a perambulator. All these devices serve a single purpose, which is, measuring distance. The origin of surveyor’s Wheel is from an odometer. Odometer simply counts the number of rotations of the wheel. The distance travelled by the wheel is directly proportional to the radius of wheel. In the digital Surveyor’s Wheel...
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Project: Gesture Controlled Mouse (Air Mouse) Using Arduino & Accelerometer

john May 24, 2018 3 Comments
AIR Mouse is also called gesture-controlled mouse and it works based on hand gesture. In this project an accelerometer is used for measuring the tilt of hand in X and Y direction and moves the cursor according the tilt. In the project two types of circuit are used, one is the transmitter circuit and other is the receiver circuit. Transmitter circuit makes use of MPU6050 series of accelerometer, which is connected to Arduino through I2C communication. The data is...
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Project: Car Speed Detector Using Arduino

john February 17, 2018 9 Comments
Car speed Detector Project In this project I am going to show you how to measure the speed of running car (or man) from outside. Police department uses this type of system to prevent over speed of vehicles. Our project is a little different from the system used by police but the overall car speed detector concept is same. In this project, two IR sensors are placed apart on one side of road. When any vehicle crosses the sensors,...
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DC Motor Speed Control Using Arduino & PWM

john February 17, 2018 2 Comments
DC Motor Speed Control Using Arduino & PWM Speed control of DC motor with PC Interface is an easy DIY project. In this project DC motor’s speed is controlled by sending the command through PC. Arduino is directly connected to PC through the USB cable and command is given to Arduino on serial monitor of the Arduino IDE. Motor is connected to a transistor, and the base of transistor is connected to PWM pin of Arduino and motors speed...
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Magneto Resistor – Symbol, Working, Types & Characteristics

john November 9, 2017 3 Comments
Back in 1856, William Thomson a Scots-Irish mathematical physicist and engineer while experimenting with iron pieces discovered a phenomenon called magneto-resistance. This effect was later on used to build a special type of variable resistor known as magneto-resistor. In this article you shall get a brief about a magneto – resistor: its working principle, characteristics and applications. So let’s delve in! What is a Magneto Resistor? It was found by Sir William Thomson that, when the iron pieces were...
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Raspberry Pi Music Player – A DIY Project

john November 9, 2017 No Comments
Raspberry Pi Music Player We all know that Raspberry Pi is a multipurpose System on-chip computer which is capable of doing all the functionalities of a general purpose computer with a low bandwidth. Everyone wants to have a customised audio player at home. Raspberry Pi is capable of providing a standard quality audio through its 3.5 mm audio jack. If you want to have a high quality audio output from Raspberry Pi, there are USB plug and play add-on...
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Carbon Film Resistor – Working, Construction & Applications

john October 29, 2017 1 Comment
Carbon Film Resistor One of the most used “passive devices” in an electric or electronic circuit is undoubtedly the resistor. Since it has wide range of applications they are found in different varieties. According to the type of resistance they offer, these devices are often classified as fixed or variable resistors. However, the resistors, either fixed or variable are not same in construction and hence are termed according to their type of construction. One of these resistor type is...
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Water Level Indicator Using Arduino & Ultrasonic Sensor

john February 17, 2018 13 Comments
Water Level Indicator Using Arduino Wireless Water Level Indicator Using Ultrasonic sensor & Arduino is an amazing and very useful project. The objective of this project is to notify the user the amount of water that is present in the overhead water tank. This project can be further enhanced to control the water level in the tank by turning it ON, when the water level is LOW, and turning it OFF when the water level is HIGH. Thus, the...
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Raspberry Pi as a Web Server

john October 29, 2017 1 Comment
Raspberry Pi as Web Server Generally Web server is a computer where the web content is stored which is used to host websites. Website is collection of web pages while web server is a software that respond to the request for web resources. There exists other web servers also such as gaming, storage, FTP, email etc. All computers that host Web sites must have Web server programs, that uses HTTP (Hypertext Transfer Protocol) to serve the files that form...
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Interfacing LCD Module with AVR in 4-Bit Mode

john October 11, 2017 1 Comment
This article is another step forward in learning more about AVR microcontrollers. We have demonstrated interfacing of LCD module with ATmega328 microcontroller, which will help you to learn its basic concepts. ATmega328 is an eight bit AVR (Advanced Virtual RISC) based microcontroller. It is a powerful microcontroller with a built-in  internal memory of around 32Kb. Atmega 328 has only 28 pins. Therefore it have only limited number of  GPIO pins. While  designing complex projects we need sufficient number of...
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GPS-GSM Based Vehicle Tracking System Using Microcontroller

john October 29, 2017 3 Comments
GPS Vehicle Tracking System This article mainly focuses on the idea and logic behind GPS Vehicle Tracking System with remote monitoring and security access using mobile phone. The GPS-GSM module is interfaced using a single microcontroller and the real-time GPS location of the system is inquired using SMS feature. The system is designed to operate only by the registered users. There is an option to add or remove the users in real-time. How does Car Tracking System Work? The...
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Simple LED Projects Using AVR Microcontroller

john October 11, 2017 8 Comments
This article is another step forward in learning more about AVR microcontrollers. We have demonstrated 3 simple LED based projects using ATmega328 microcontroller, which will help you to learn its basic concepts. ATmega328 is an eight bit AVR (Advanced Virtual RISC) based microcontroller. It is a powerful microcontroller with a built-in  internal memory of around 32Kb. Most Arduino boards consist of an Atmel 8-bit AVR microcontroller with varying amounts of flash memory, pins, and features. Arduino Uno is a...
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Photoresistor – Symbol, Working, Types & Applications

john October 29, 2017 6 Comments
Photoresistor – A Detailed Guide While walking through the streets in the evening, have you ever noticed how the street lights turn on automatically as it starts getting darker?  This automatic switching ON of the street lights are due to the presence of a special type of variable resistor on its circuit. The resistance of this variable resistor depends on the amount of light that falls on it. Such a resistor is called the photo-resistor, and in this article...
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Thermistor – Working, Symbol, Types & Applications

john October 11, 2017 4 Comments
If you are looking for a temperature sensor that is cost effective and accurate, your first choice may be a thermistor. It is a type of resistor whose resistance changes with change in temperature.  This article deals with the working, types and applications of a thermistor. Lets start! What is a Thermistor? Coined from the words “THERmally controlled resISTOR”, thermistor is a temperature controlled resistor. The resistance offered by this solid state temperature controlled device depends on the ambient...
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Advantages of Turnkey PCB Assembly Services for Start-Ups

jojo November 7, 2018 No Comments
Hardware development has become increasingly accessible to hobbyists and new companies alike. CAD software is open source or low cost, parts can be ordered online and now fully assembled PCBs can be ordered with ease. PCB manufacturers offer turnkey PCB assembly services which are beneficial to all hardware makers, but especially start-ups. Any company can have high quality circuit boards produced at low volumes at an affordable price thanks to advancements in the circuit board manufacturing equipment. Let’s say...
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Arduino Gear Motor Interface Using IC L293D

john October 29, 2017 No Comments
Arduino Gear Motor Interface Using IC L293D In this article, we are publishing a project which explains different aspects of Arduino-Gear motor interface. Gear motor is a specially designed DC motor whose gear assembly helps in increasing the torque and reducing the speed. Compared to a normal DC motor, maximum rpm a gear motor can produce is less. But they have the advantage that by using the correct combination of gears, its rpm can be reduced to any desirable...
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Simple Robotic Arm Project Using Arduino

john February 17, 2018 9 Comments
Robotic Arm Project Using Arduino Nowadays, manual labor is being reduced at big scale industries and factories to increase efficiency and gain profit by installing robots that can do repetitive works. A onetime installation of such a device may cost a huge amount, but in the long run, will turn out to be more profitable that manual labor. Out of the lot, a simple robotic arm is one of the most commonly installed machines. We are introducing the basic...
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