“The connect between Saraswati and Laxmi is missing”
While talking about Indian innovations and innovators, R.A. Mashelkar, former director general of Council of Scientific & Industrial Research (CSIR) and chairman of National...
Pull-Pin Security Alarm
Here is a simple and low-cost circuit of pull-pin security alarm. While travelling, rig the alarm unit to your luggage using a home-made security...
Electronic Electroscope
An electroscope is the instrument used to detect charged bodies. Here is an electronic version of the scope that is sensitive and, unlike conventional...
Nano-Ampere Meter
This circuit can measure currents down into the nano-ampere range. It is useful when building, testing and experimenting with low-power circuits, especially those operating...
BCD Frequency Meter
Here is a simple circuit that precisely measures the frequency in BCD format. The circuit is built around dual comparator LM393 (IC1), dual D-type...
8-bit Generator and Display For Microcontroller
For testing of microcontroller-based circuits, you need two test jigs: One for generating the desired bitstream to serve as the input to the device...
“It will take India at least five years to realise the...
Satish Aggarwal, member, IEEE-SA Board of Governors, and senior programme manager, United States Nuclear Regulatory Commission, shares with Uma Bansal, executive editor at EFY,...
Capturing Concepts With 3D Scanning And Modelling
Today, aesthetics play pivotal role as a key product differentiator. 3D scanning and modelling provides designers with a shorter and smarter way to create...
LASER-BASED INTRUDER ALARM
You can use this laser-based intruder alarm conveniently at the entrance of a hall or any other similar location to protect the same from...
AC MAINS BISTABLE SWITCH
This AC mains-operated bistable switch turns on or turns off a device using a miniature neon lamp and a few discrete components. This switch...
