Electronics For You
August 2012 Issue
Vol. 44 No. 8
Simple Low-cost Intercom
Sometimes you need to communicate from your room with someone in another room of the house, in the garage, in the courtyard or at the entrance door. Or, you may need to monitor your children or an elderly relative in the other room.
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Telecom Revolution: 4G and Beyond
4G offers benefits but not without its share of problems. Nevertheless, the telecom world, ably supported by chipmakers, is all set to stride ahead into new 4G horizons
Which Development Board To Use For Your Embedded Project?
Given the plethora of development boards available in the market, selecting the one for your project may be a pretty mean task. However, once you see all these boards, there is a greater chance that you might find one that is more suited to your project at hand
| ||eStyle Buyers' Guide|
Unlike devices like smartphones and PCs, multifunction printers (MFPs) are quite affordable. For as less as ` 3000 you can easily get an MFP from the market. Here is a ready-reckoner to help you find the best MFP for your needs
Electronic Card Lock for Appliances
The circuit presented here can be used as a lock for important electronic and electrical appliances. When a card is inserted inside its mechanism, depending upon the positions of the holes punched on the card, a particular appliance is switched on.
Download source code
In the world of hobbyists, the function generator ranks pretty high in the list of essential items for the lab bench. However, commercial units can be very expensive. This makes function generators a prime candidate for home construction.
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Artificial Neural Network Simulation in Labview and Matlab
Artificial neural network, in essence, is an attempt to simulate the brain. When the user enters the inputs (say, p1, p2 and p3) and the expected corresponding outputs (say, t1, t2 and t3) in the program, the program trains the system and gives a final weight. The final weight is computed to get the final expected output. This program is an attempt to understand the basics of artificial neural network and how one can use it for further applications.
Download source code
| ||Circuit Ideas|
Simple Crystal Tester
Here is a simple circuit that can be used to test a crystal before using it in a circuit. The circuit is built around two BC547 transistors (T1 and T2) and a few discrete components.
Touch-Free Timer Switch
his type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly see use of infrared proximity sensors on public drinking fountains and in public washrooms.
| ||Circuit Ideas|
Over-Voltage Disconnect Switch
Circuit designers often test prototypes with a variable-voltage bench power supply. Any accidental change in the voltage level could damage components in the prototype. This can be prevented by using an over-voltage disconnect circuit in series with the prototype under test.
Parked-Vehicle Highway Flasher
O often, at night, a speeding vehicle rams into another vehicle parked at the edge of a highway. Cars have parking flashers, but trucks, buses and loading rickshaws rarely have any form of a warning flasher. Here is a simple circuit of an effective flasher which is visible from a distance of up to 300 metres.
| ||Test & Measurement|
What’s New in Spectrum Analysers
If you plan to upgrade your test lab, you would like to get the latest spectrum analyser available in the market. This article talks about the latest cutting-edge spectrum analysers that are out in the market, covering their pricing, new technology and improved functionality
An Insight into CAPTCHA
You may hate those blurry letters, putting you off filling in an online form. But have you ever thought what exactly are these simple tests for? Here is an introduction
And Then, There is Embedded Vision!
Computer vision is the use of digital processing and intelligent algorithms to interpret meaning from images or video. Due to the emergence of very powerful, low-cost and energy-efficient processors, it has become possible to incorporate vision capabilities in a range of embedded systems
Sky Bound, Yet Online
“I’m travelling with limited access to Internet” might soon be a redundant out-of-office mail responder!
Commercial Applications of Nanotechnology
The scope of application of nanotechnology is very wide. Advanced research organisations around the world have identified five key market areas where nanotechnology can bring market-changing competitiveness as detailed in this article
CCTV Cameras and DVRs Market Expanding
With CCTV cameras being installed in busy markets of small cities and demand increasing from residential sector, this industry is set for tremendous growth
RFID Technology: A Complete Overview
RFID technology allows non-contact transfer of information (much like the familiar barcode), making it effective in manufacturing and other hostile environments where barcode labels could not survive. Take a look at how it works and what are its pros and cons
Get the Cutting Edge With EDA
There are just a handful of industries where employee is the king, literally. Electronic design automation is surely one of those. Engineers who make a career in EDA tools design enjoy an edge over the rest in other industries
| ||eStyle First Look|
. Dual-SIM Solar Phone
. 3D Blu-ray Home Theatre System
. Android 4.0 Tablet For ` 9000
. Dual-Pairing Bluetooth Headset
. 14MP Camera With 30x Optical Zoom
. Portable Universal Charger
. Monochrome Laser Printers
. TV Recorder
. GizMo ByTes
Maximising Solar PV Energy Penetration
The technology challenge in PV will be to generate innovations in efficiency and cost reduction fast enough to maintain a profit margin
Electronic Circuit Prototyping More Than Just An Artefact
Certain doubts in the design of an electronic product can be cleared by building and studying a prototype first. Here we discuss the challenges and different approaches to prototyping
DSP-based Dynamic Balancing Indicator
A newly developed digital system for detecting mass unbalance in rotating machinery is compact and easy-to-operate yet inexpensive
"TV users do not like a lot of interactivity"
Verismo Networks, an Internet TV platform provider headquartered in the US, has an R&D centre in India. It has developed a customisable end-to-end solution for delivering Internet videos directly to the TV without the need for a PC. Satish Mugulavalli, co-founder and chief architect of Verismo Networks, spoke to Dilin Anand of EFY about the Internet TV set-top box and its comparison with Apple TV and Google TV
Telecom T&M instruments have a high level of sophistication
Electronic test and measurement (T&M) instruments are indispensable for validating the functioning and performance of electronic products. P.S. Deodhar, chairman of Aplab, one of India’s leading manufacturers and exporters of test & measurement instruments, spoke to EFY’s Uma Gupta about the T&M industry, outlining key trends and recent activity
LED Lighting Trends
Remote Monitoring System for Homes