Handsets with the Nokia Lumia Pure View cameras may boast of an astounding count of 41 MP but a newly erected DEC (Dark Energy Camera) has somewhat shaken its reputation. To make things clear, this is not a camera phone that anybody can keep in his pocket but reportedly the most powerful sky-mapping machine. The DEC has captured and recorded light from 8 billion years ago.
ARM Keil RTX Real-time Operating System Offers ‘tickless’ Power-saving Mode
Energy Micro has announced the immediate availability of the Keil RTX real-time operating system (RTOS) as part of its Simplicity Studio tool suite. The Keil RTX, which has been optimised for ARM Cortex-M processors to provide flexible scheduling and high-speed operation, has been extended by Energy Micro to enable an ultra-low power, deep-sleep mode between tasks.
Energy Micro has implemented an extension to the ARM Keil RTX that is referred to as a ‘tickless’ mode and which allows the EFM32 MCU to wake up only when needed, either at a scheduled time or on an interrupt event. This results in orders of magnitude better current consumption than competing solutions based on using the system timer, SysTick, which require a constantly running, high frequency clock. With RTX RTOS, EFM32 users can now enter a deep sleep mode, consuming less than 1uA, between normal active operations.
Energy Micro has implemented an extension to the ARM Keil RTX that is referred to as a ‘tickless’ mode and which allows the EFM32 MCU to wake up only when needed, either at a scheduled time or on an interrupt event. This results in orders of magnitude better current consumption than competing solutions based on using the system timer, SysTick, which require a constantly running, high frequency clock. With RTX RTOS, EFM32 users can now enter a deep sleep mode, consuming less than 1uA, between normal active operations.
Android Applications for the Electronics & Electrical Engineers
The world around us is changing at a much faster pace than any one can anticipate. The world of “computing” has already seen great shifts from Desktops to Notebooks to Smartphones and Tablets. The coming decade will be more focused on mobile computing and cloud computing. Here in this article, I am listing some of the best and really useful applications released in Android market (aka Google Play), that comes handy for any one who is working in Electrical and Electronics industries/professions.
Interfacing hex keypad to 8051
This article is about interfacing a hex key pad to 8051 microcontroller. A clear knowledge on interfacing hex key pad to 8051 is very essential while designing embedded system projects which requires character or numeric input or both. For example projects like digital code lock, numeric calculator etc. Before going to the interfacing in detail, let’s have a look at the hex keypad.
Hex keypad.
Hex key pad is essentially a collection of 16 keys arranged in the form of a 4×4 matrix. Hex key pad usually have keys representing numerics 0 to 9 and characters A to F. The simplified diagram of a typical hex key pad is shown in the figure below.
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