About: Ibrar Ayyub

Small test strips made of silver or other metals, called “coupons,” are frequently used to assess and predict the speeds at which metals used in outdoor environments—pipelines, aircraft, bridges, as well as countless other types of infrastructure and machinery—will succumb to corrosion.

This Design Idea describes a 9V battery-voltage monitor whose total parts cost less than 34 cents (Figure 1). You configure transistor Q1 as a 10-mA current sink. LED1, a Kingbright WP7104IT, is on when the battery voltage is good. When the battery voltage nears the threshold voltage, the LED gradually dims. It goes out once […]

This project describes an Arduino-based FM transmission using the KT0803K Digital Stereo FM Transmitter Radio-Station-on-a-Chip. The KT0803K device is designed to process high fidelity stereo audio signal and transmit modulated FM signal over a short range. It features an on-board 20-bit audio ADC and supports standard I2C interface for frequency setting and power control the […]

This project was inspired by the “Big Air” open baffle system by Jim Strasser (please contact me for additional information regarding that system). That Big Air open baffle is a simple good sounding system based on a different woofer, smaller baffle and does not incorporate a few other things that I have added. My target […]

Although this kind of voice effect can be obtained by means of some audio computer programs, depending on the equipment you are using this microphone input and loudspeaker output could be more versatile. This design uses a variable gain microphone preamplifier built around IC1A, a variable steep Wien-bridge pass-band filter centered at about 1KHz provided […]

Series 1930 may be probably familiar to you, for example from our article Series 1930 – Double Pole Rocker Switches with IP65. Till now, we had in stock types 1935.x with green and red backlight. We react to your requests for switch with the same excellent properties but without a backlight and for as good […]

Google’s latest and hottest gadget needs little introduction. Since its public unveiling in April 2012, the tiny head-mounted Android computer has been collecting controversy and sociological analysis. It is currently available in limited beta to eminent members of the tech community and to a selection of “Glass Explorers.” As members of the latter program, we […]

This is a first in a series of stories called “EEvolution of an idea” showing how a good idea got its start and evolved into a viable product in the electronics industry. I would ask our faithful EDN readers to comment on this series idea and if there is a good positive response which views […]

I just happened to see some large strips of LED lighting when I was picking up some parts at Maplin which were on sale (if I remember correct they were around £12 per approx. 2m strip) however the controller/driver was still around £40, so I thought I would just build a better one myself. I […]

This Instructable will demonstrate the building of a bare bones (and really inexpensive… less than $5) Arduino compatible module that can be put together on a small piece of stripboard and can be used either on a breadboard or independently. The following links / similar projects were used as inspiration: * http://www.instructables.com/id/Small-form-factor-DIY-Arduino-on-stripboard/ * http://tinkerprojects.blogspot.com/2012/06/minimal-arduino-on-small-stripboard.html * http://shop.moderndevice.com/products/rbbb-kit * http://txapuzas.blogspot.com/2010/07/paperduino-stripboard.html The […]