What Is Single Board Computers

admin — Thu, 21 May 2009 09:41:28 +0000

Single Board Computers (SBCs) have developed rapidly due to miniaturization technology, which implements more functionality in smaller spaces. The technological progression of “integrated circuit” (IC) technology, which has created the SBC by reducing sizes for the central processing unit (CPU), program memory and disk controller units, so they can be stored on smaller “large scale integration” (LSI) chips. The SBC has replaced multiple circuit boards with one single circuit board.

The early recognized SBC was the Intel C8080A, created in 1976; eventually evolving into the Mini-Micro Designer 1, (MMD-1). The embedded SBC was developed to fulfil a few, mission-critical, technical functions (i.e. scrutiny devices, interchange lights, industrial automation and MP3 players). Shrinking has permitted “embedding of advertisement saucer operating systems within non-computer devices.”

The SBC structure has focused around receptacle sustenance and situation. The PC/104 structure has get real popular due to its “plug-and-play” interoperability (which is in opposition to most SBCs). It is ultra-compact in 3.6″ x 3.8″ stackable modules.

The PC/104 Embedded Consortium was supported in 1992 to investing the advantages of the mass-produced, cost-effective PC architecture with the miniature embedded SBC structure. It has landscaped PC/104 inter connectivity and sympathy specifications in prescribe to combat future challenges from embedded information and restored link devices similar Coupling Series Bus (USB).

The past PC/104 Embedded Syndicate restriction delegate to the PC/104 express [adding two USB connections] has allowed for improved sympathy with transmission devices through SATA, ExpressCard and relevant plug-in connective resource. The PC/104 is attempting to enter its functionality edge patch adding plug-in connectivity.

The PC structure is more versatile, bulkier and cost-effective due to mass-produced normalisation; it tends to be statesman agreeable with a wider ambit of software and constituent plug-ins. On the added clapping, according to the PC/104 Embedded Association, the “standard PC bus form-factor (12.4″ x 4.8″) and its associated greeting cages and backplanes are too bulky (and costly) for most embedded contain applications”. The reduced situation of the PC/104 relic a sharp asset.

The Via Technologies Mini-ITX structure (6.7″ x 6.7″ measurements) has leader low powerfulness phthisis, working author quietly than remaining SBCs.

The Embedded Adps for Postindustrial Engineering (Epos) focuses on process of minute, industrial-grade SBCs fully harmonious with the PC/104, offering a link supportive Encircling Section Interconnect (PCI) Get and ExpressCard elaboration. This discipline uses point-to-point series links, kinda than a shared nonintersecting bus structure. The numerous I/O treatment options are advisable for large processors which condition higher alter thresholds.

Linux give seed application oftentimes needs underway mainstream chipsets and median activity for SBC functionality. Galore reside hold packages (BSP) for Windows CE and Windows XP Embedded Operating Systems enable surpass connectivity with SBCs.

Activity conductor companies, such as AMD, Intel and Sun Microsystems are rapidly onward SBC inter connectivity with aborning wandering technologies.
The Concern Wide Web has created the family of interconnectedness with nearly every computer. SBC technology developing is employed to implement this new image, spell maintaining its shrilling show functionality in a low situation.

What Is Humidity Sensor?

admin — Fri, 17 Apr 2009 09:45:18 +0000

As we know The weight of water vapour in the air per unit volume of air, usually expressed in g/m3, Humidity sensors are gaining more significance in diverse areas of measurement and control technology. Manufacturers are not only improving the accuracy and long-term drift of their sensors, they are improving their durability for use in different environments, and simultaneously reducing the component size and the price.

Following this trendThe new product, SHT11 or HS 1101, is a single chip relative humidity and temperature multi sensor module with a calibrated digital output which allows for simple and quick system integration. Swiss-based Sensirion AG has introduced a new generation of integrated, digital, and calibrated humidity and temperature sensors using CMOS “micro-machined” chip technology.

Conventional sensors determine relative air humidity using capacitive measurement technology. For this principle, the sensor element is built out of a film capacitor on different substrates (glass, ceramic, etc.). The dielectric is a polymer which absorbs or releases water proportional to the relative environmental humidity, and thus changes the capacitance
of the capacitor, which is measured by an onboard electronic circuit.

The stability: Due to the relatively large dimensions of the sensor elements (10-20 mm2),The aging of the metallic layer electrodes can also lead to errors in the humidity signal. as well as the aging of the polymer layer, current capacitive sensors on the market exhibit varying degrees of sensitivity to the same external influences. Therefore, the drift per year, i.e., the yearly change in error tolerance of the sensor,is becoming an important criteria for quality.

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What Is Single Board Computers

What Is Humidity Sensor?

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