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MOBILE BUG

EFY Bureau
This handy, pocket-size mobile transmission detector (Mobile Bug) can sense the presence of an activated mobile phone from a distance of one and a-half...

“Modeling and simulation help to design a perfect combination of automotive subsystems”

EFY Bureau
At MathWorks’ second annual India user conference in Bengaluru, customers and technical experts discussed the capabilities of MATLAB and Simulink for design, modeling and...

Build a Flashing UFO Toy with Lights and Sound Effects

Suresh Dwivedi
This unidentified flying object (UFO) is nothing but an electronic toy depicting the fantacy. It comprises three separate sections, viz, rim flasher, dome flasher...

Automatic Lamp Brightness Control Circuit

Suresh Dwivedi
The circuit described here can be used for controlling a decorative lamp from zero intensity to maximum intensity in a specified time. Typical applications...

CLAP REMOTE

EFY Bureau
An infra-red or wireless remote control has the disadvantage that the small, handy, remote (transmitter) is often misplaced. The sound operated switch has the...

CD-ROM DRIVE AS DIGITAL AUDIO CD-PLAYER

EFY Bureau
ACD-ROM drive can be used as a stand-alone unit for playing digital audio CDs without interfacing with a computer. The stereo output of CD...

Precision 1Hz clock Generator using Chip-On-Board

EFY Bureau
Usually the circuits for generation of 1Hz clock for applications in digital clock and counter circuits make use of ICs in conjunction with a...

Variable Power Supply Using a Fixed-Voltage Regulator IC

EFY Bureau
A voltage regulator (also called a ‘regulator’) with only three terminals appears to be a simple device, but it is in fact a very...

Micro-Power Flasher

Correspondent #6 EFY News Network
With this micro-power flasher you can baffle the intruders trying to break into your home. The unit continuously emits flashing light both during day...

Hearing Aid

Correspondent #6 EFY News Network
This low-cost, general-purpose electronic hearing aid works off 3V DC (2x1.5V battery). In this circuit, transistor T1 and associated components form the audio signal preamplifier...
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