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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Rheostat – Working, Construction, Types & Uses

john September 22, 2017 55 Comments
Rheostat – Working One of the most omnipresent electric components is the resistor. In applications where variable resistance is required, potentiometers and rheostat are mostly preferred. We have already discussed about potentiometers in our previous article about the same. Here we shall discuss about rheostat in detail. What is a Rheostat? Rheostat is a type of variable resistor, whose resistance can be changed so as to change the amount of current flowing through a circuit. This device, was named...
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RFID Reader and Tag – Ultimate Guide on RFID Module

jojo September 28, 2017 No Comments
This article is developed as an ultimate guide on RFID reader module and RFID tag – and explains how it works. We have published many interesting projects using an RFID reader module – like RFID Attendance Management System,  or RFID based Access Control System. We have also published simple RFID reader based projects like a Simple RFID Door Lock. All these projects make use of an RFID reader and an RFID tag. This article helps you understand more about...
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Interfacing Bluetooth Module

Bluetooth Module Interfacing using HC05 Module and Wireless Communication

jojo July 6, 2017 No Comments
Bluetooth modules are used for short distance and point-to-point wireless data transmission and reception. The range of distance varies from module to module depending on the version of the module being used. For DIY projects, these are available as breadboard friendly modules. Even though these modules (hobby purpose modules) do not provide access to all those pins in the actual module (For Ex:- the GPIO pins ) provided by the manufacturer, these are fairly enough for wireless communication. In...
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How a Thermostat Works – Tutorial

jojo September 28, 2017 3 Comments
When summer sets in, it can be a misery to wage a battle with the heat. Thankfully, you can turn down the thermostat of your HVAC unit and create a comfortable and pleasant indoor temperature. Similarly, in the winter months, you can crank up the thermostat and keep cozy and warm. Homeowners often don’t pay too much attention to the humble thermostat, which is a cleverly designed gadget that ensures ambient temperature is always comfortable, regardless of the outside...
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Resistor Color Code Chart – Understanding Resistance Color Coding

jojo March 20, 2014 6 Comments
“Color coding” is used in electronics to identify between different components. In the case of resistors, color coding is used to identify a specific resistance value, for example a 100 ohms resistor or a 1 kilo ohms resistor with 5% tolerance. Electronic components like resistors are very small in size and its difficult to print its value directly on to the component surface. Hence a standard was formed in 1920 by then Radio Manufacturers Association (now part of EIA...
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How to debug in Keil Microvision

Nilay Banker November 21, 2012 4 Comments
In this article we will take a look at Debugging feature of Keil uVision. In Previous Article we had seen how to create project, hex file and building Project. Once you build your project and if you see 0 errors and 0 warnings you are half way through your project. Now what is debugging? Debugging is to identify and fix bugs in your project e.g. logical or synchronization problems in the code, or a design error in the hardware.First go...
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Getting Started with Keil uVision

Nilay Banker November 4, 2012 24 Comments
An Introduction to Keil MicroVision Embedded system means some combination of computer hardware and programmable software which is specially designed for a particular task like  displaying message on LCD. If you are still wondering about an embedded system, just take a look at these circuit applications using 8051 microcontroller. You can call these applications embedded systems as it involves hardware (8051 microcontroller) and software (the code written in assembly language). 1. Voltmeter using 8051 2. Thermometer using 8051 3....
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Bit rate Vs Baud rate – the common misconception

Anish September 17, 2012 26 Comments
The two most common/confused words in digital communication – Bit rate and Baud rate. Generally, communication is concerned with transmission of data. In digital communication, there are two entities that are needed to carry out communication – the data to be transmitted and the signal over which the data is transmitted. Now, we have two entities to be worried about – the data and the signal. The most common misconception is that most people think both travel at the...
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How to recover/reset admin username and password of Vbulletin forum software

jojo September 11, 2012 121 Comments
This article is a little off topic as it is not related to electronics! However I thought this would be useful for some one who manages a Vbulletin forum software. For those who find the name “Vbulletin” alien, it’s a forum management software. We use it to power our CircuitsToday-Forums. Recently we lost access to our “administrator” account of our forum software! There had been no way we could access the admin account and all attempts to retrieve password...
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