Toolkit: A Look at the Gear That Experts Use to Spy on Spies is an interesting article. Kevin Murray heads one of the most sophisticated surveillance-detection firms according to the article. Wired asked Murray about the bevy of gizmos he and his staff use to sniff out corporate espionage. →
Oh, batteries. Can’t live with ‘em, can’t live without ‘em. Then I saw some news on this field. Potatoes May Power The Batteries Of The Future article tells about a potato powered battery. It promises to be simple, sustainable, robust device can potentially provide an immediate inexpensive solution to electricity needs in parts of the →
Power-line networking has been increasing in popularity at some areas but the success does not become without problem. Power line tech could crash aircraft and shut down the Archers article says that an extensive study commissioned by Ofcom concludes that power line networking could crash airplanes and block Radio 4 in UK. According to the →
iPhone mag-stripe reader stalled article tells that Square, the expected to be breakthrough business launched by twitter-founder Jack Dorsey, won’t be shipping as scheduled. Interesting is that Square was just a magnetic-stripe reader, and that there were a dozen credit card-processing applications on the iPhone. Only this time, it comes with a plastic lump that →
Ground loop can cause considerable currents to flow on all cables on the loop. It is not uncommon to have a voltage of 1V RMS between the earth connections of power outlets that are wired separately back to the switchboard. This small voltage, with a total resistance of perhaps 0.2-0.5 Ohm, will cause a loop →
An ungrounded system is one in which there is no intentional connection between the system conductors and earth. When the neutral of the system is not grounded, it is possible for high voltages to appear from line to ground during normal switching of a circuit having a line to ground fault. These voltages may cause →
Differential Scope Primer is a good introduction to oscillospe measurement. This web posting is a shortened version of the information on that document related to ground loops. I have also added here some of my own comments. Most oscilloscopes are designed to measure voltages that are referenced to earth ground, which is connected to the →
EDN magazine publishes every year directory on various microprocessorors. The directory provides a snapshot each year of the companies, products, intellectual property, and software-development tools available as digital-signal-processing resources for embedded-system developers. Scratching the surface: The 2010 DSP Directory lists the relevant DSP offerings this year. This directory aims to provide designers and system architects →
Selling products whose design anyone can access, edit, or use on their own is pretty crazy. It’s also good business according to 13 Open Source Hardware Companies Making $1 Million or More (video) article. The article mentions thirteen companies with million dollar revenues from open source hardware (OSHW).Companies providing OSHW allow all designs of the →
Power Quality and Utilisation Guide is a free on-line reference source for power quality information. It provides both background theory and solutions from electrical power industry. The guide is prepared by specialist authors from industry and academia, and edited by Copper Development Association‘s David Chapman. The Guide is organized into 8 sections and presented in →