Author name: jojo

Tools and Softwares

How to Build PCB Online using Web Based EDA Tools

This is a brief review of the capabilities and ease of use of three of the most interesting, innovative and downright disruptive web-based EDA tools: EasyEDA Upverter Autodesk 123D Circuits (formerly Circuits.io) The same simple astable multivibrator circuit is entered into each tool and the design process followed through simulation (where offered), to PCB layout […]

GSM based Fire Alarm Project
Arduino

GSM based SMS Alert Fire Alarm System using Arduino

In this article,we are going to build a Fire Alarm System using Arduino, LM35 Temperature Sensor and GSM Module. The objectives of this fire detector using arduino is to sense the surroundings for occurrence of fire with help of LM35 temperature sensor, and send 3 SMS alerts to two mobile numbers stored inside the arduino

Arduino

Simple RFID based Door Lock using Arduino

Its quiet fun to work with RFID based projects! In the previous article, we saw how to interface RFID with Arduino. Interfacing is the first step to create any useful project. So why don’t we create an RFID based Access Control System or an RFID based Door Lock using Arduino? The system I have designed

Arduino

Interfacing RFID with Arduino – How to Read RFID Cards using Arduino

In this tutorial, we are dealing with yet another interfacing technique. This time we are interfacing an RFID Reader which can read RFID Tags to Arduino. RFID is Radio Frequency Identification. An RFID reader is used to read RFID tags (which contain certain unique data stored in a chip). An RFID reader and an RFID

Arduino

Arduino Projects -The Big List of Arduino Based Projects

In this article, we compile all the best and interesting projects we have developed using Arduino. These days Arduino projects are used for academic course fulfillment as well. In any case, Arduino is a very interesting platform to build real world projects. List of Arduino Projects Gas Leakage Detector with GSM Module for SMS Alert

8051

8051 Timers and Counters

In this article, we focus on Timers/Counters of the 8051 micro controller. The 8051 has two counters/timers which can be used either as timer to generate a time delay or as counter to count events happening outside the microcontroller.                       The 8051 has two timers: timer0 and timer1. They can be used either as timers

Arduino

Simple LED Projects using Arduino

This article is another step forward in learning more about Arduino.  In our previous article, I have written in detail about blinking an LED using Arduino. We have demonstrated 5 simple led based projects using arduino, which will help you to learn its basic concepts. 1. Blinking Two LED’s using arduino 2. Control LED using

Arduino

Blink LED with Arduino – say Hello World

When we learn a new programming language in computer science (say C, PHP or Java), we begin the learning curve with the classic “Hello World” program.  We learn some essential keywords used in the programming language, then we learn the structure of the language and finally we begin to play with the language by making

Arduino

What is Arduino – Introduction to Arduino for Beginners

In this article, we explain the basics surrounding arduino. As the title indicates, this article is for absolute beginners in the world of electronics and for people who are beginning with arduino boards. Arduino is an electronics prototyping platform based on a micro controller. Arduino boards are usually made using Atmel’s Atmega series micro controllers

Basic Electronics, Tutorials

Decoding the Resistor Colour Codes 101

A look into the electronic circuit board mostly shows wires with colorful bands, called resistors. These color bands indicate the values of those resistors like the identity card does for us. With these color bands, we can identify the resistive value and its percentage tolerance of a resistor.  For large power resistors, the resistor body

Reviews

DatasheetLib – A new Datasheet Database Website to revolutionize Datasheet Discovery

Electrical engineers all over the world would bet anything for a better datasheet search engine. It’s such an underserved market that there are still rooms for improvement. Although there are hundreds of websites that supply datasheets in the form of PDF like DatasheetCatalogue, AllDataSheet, and many others, recently launched DatasheetLib follows a different approach from

History

Solar Cell – Invention History & Story – From Selenium to Silicon

Invention History of Solar Cells – From Selenium to Silicon Well, the definition of a solar cell is simple. It is a device that directly converts the energy from sunlight into electrical energy. However, its horizons are really vast. The most significant fact is that the invention of this wonderful device didn’t happen overnight. Interestingly,

History

Vacuum Tube Invention History and Story behind Invention

The story behind the invention of vacuum tube   Anything in Science has its own history and some hidden truths behind its invention. It must be fascinatingly curious for any science savvy person to know the invention story of technical tools, and other innovations of Science. This is one such write up which will help

History

Integrated Circuit Invention History and Story Behind the Scenes

Invention of Integrated circuits – Behind the scene Have you ever heard the story behind  invention of  integrated circuits or what made people work on it? Well, if your answer is ‘No’, continue reading to unveil the truth. This article takes you through the path of invention and developments of integrated circuits. What are Integrated

101-Announcements

Taking Down Forums in CircuitsToday

Hi Friends,  2 years before, we have launched Forums in CircuitsToday with great expectations. However due to lack of time on our side, we failed to monitor the forums properly. Above all the software we bought to power forums was too susceptible to spam activities. We had a tough time dealing with “automated spam” activities

History

The Story & History of Transistor Invention

Transistors and its path of invention We all know “transistor” is an integral part of any electronic circuit/device. It is very rare to see any circuits built without at least one transistor. This  semiconductor device is used either for switching purposes or for amplification purposes in electronic devices. They are either packed separately or found

History

The Story of PN Junction Diode

I am really excited by the amazing comments & responses I got for my two articles on PN Junction. If you have not read them yet, here they are – 1) Understanding the PN Juction and 2) PN Junction Diode Characteristics. In those 2 articles, I have tried to demystify PN Juction and explain it

LED related

What are the Different Types of LED’s available

This article is a guide for any one who is interested in knowing about the different types of LED’s available in the market. This can be considered as a general informational guide on LED and a buying guide for hobbyists as well.  One important challenge I faced while writing this guide was to incorporate consumer

Education & Training

How to start your career in Web Development & Web Technologies

Usually we publish articles that are of interest only to the “electronics” community. However today I thought of publishing an article about career opportunities in Web Development & Web Technologies. The reason being the wide opportunities it provides for fresh engineers & graduates. “Cloud Computing” is making a wave and plenty of new job opportunities

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