About: Ibrar Ayyub

The company was TiVo, the pioneer in commercially-available digital video recorders (DVR). In its 10-year history, TiVo has sold millions of DVRs and service subscriptions. In this article, we’ll look at how the typical set works and the services TiVo provides. Several manufacturers make TiVo sets, including TiVo itself, but they all have one thing […]

The original version of xTimer used MAX7219 for driving 7-segment. This new design uses a cheap CMOS shift register, 4094 for LED interface. Each 4094 drives a 0.5″ 7-segment without the need of limiting resistor. The left-hand LED is timer function with buzzer alarm output. The right-hand is for clock display. Hardware Schematic Fig. 2 […]

Back in November 2012, EDN Brand Director Patrick Mannion published a teardown of a cell-phone battery charger. The design was not well done and received bad reviews. Redemption! I recently acquired a Mophie juice pack powerstation mini smartphone and USB-device battery charger that not only negates the previous teardown fiasco but also demonstrates the ability to provide more […]

Image enhancement – This works by collecting the tiny amounts of light, including the lower portion of the infrared light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image. Thermal imaging – This technology operates by capturing the upper portion […]

The National Nuclear Security Administration (NNSA) today announced that its Sequoia supercomputer at Lawrence Livermore National Laboratory (LLNL) has completed its transition to classified computing in support of the Stockpile Stewardship Program, which helps the United States ensure the safety, security and effectiveness of its aging nuclear weapons stockpile without the use of underground testing.

Its a digial clock which make use of AT89C4051 to work as a Real time clock. Figure 1 shows the circuit diagram for the digital clock. Port 1 of the controller (AT89C4051) is used as the data lines for the LCD (starting from pin 7- pin14 of LCD). As you can see there is not […]

San Francisco, USA – February 19, 2013 – Imec demonstrated a low-power (20µW), intra-cardiac signal processing chip for the detection of ventricular fibrillation at this week’s International Solid State Circuits Conference (ISSCC 2013) in San Francisco with Olympus. An important step toward next-generation Cardiac Resynchronization Therapy solutions, the new chip delivers innovative signal processing functionalities and […]

The VCR marks one of the most important events in the history of TV because, for the first time, it gave people control of what they could watch on their TV sets. Prior to the VCR, there was no such thing as a video store, and when you consider that there is now a video […]

Mechanical engineers at the University of California, San Diego invented a robot designed to scoot along utility lines, searching for damage and other problems that require repairs. Made of off-the-shelf electronics and plastic parts printed on an inexpensive 3D printer, the SkySweeper prototype could be scaled up for less than $1,000, making it significantly more economical than the two models of robots currently used to inspect power lines.

Introduction Approach used for creating the pure sine wave described in this paper is done through manipulation of mathematical representation of the original sine wave. It is done by dividing half the  sine wave into m (even number) segmentations, where area under a quarter of the sine wave from 0 to  π/2 resembles series of […]