ARLA/CLUSTER : FW: Engenharias e Tecnologias 20, de 24 de Maio

[Miguel Andrade]

-----Mensagem original-----
De: Engenharias&Tecnologias [mailto:engtec  senaeng.com]
Enviada: quarta-feira, 24 de Maio de 2006 19:53
Para: ct1etl  clix.pt
Assunto: Engenharias e Tecnologias 20, de 24 de Maio


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Engenharias & Tecnologias

... a newsletter semanal dedicada as novas tecnologias, elictricas e
electrsnicas
Exemplar no20, 24 de Maio de 2006, Subscrigao gratuita, copyright 2006


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Contezdo

- Notas do Editor
- Artigos de Interesse
- Novos Componentes
- Eventos
- Ideia de Montagem, circuito experimental
- Emprego!
- Acerca da Engenharias&Tecnologias, subscreva a newsletter!



Notas do Editor

     Esta semana chamo a atengco para um blog sobre energias renovaveis,
criado pelo inventor de um novo conceito/ forma de aproveitar o movimento
das maris. O blog ainda vai com pouca participagco, mas nco deixa de ser
interessante a leitura de todo o projecto e como esta composta a ideia.
Aconselho a visita: http://www.energrenovaveis.blogspot.com/

     Correm rumores que o nosso pams vizinho, Espanha, vai baixar a taxa do
IVA. Verdade, ou nao, i que ja comegam a haver algumas vozes inquietas,
relativamente a estas notmcias. Com o estado da economia portuguesa a nao
ver melhorias nos prsximos tempos, e a arriscar-nos a que suba o IVA outra
vez, ficamos em forte desvantagem com os nossos vizinhos.
     A ver vamos o que as prsximas semanas trazem em relagao a novidades.


     Quer fazer uma contribuigao, com um artigo para a
Engenharias&Tecnologias? Envie-nos um email ou um abstracto para
engtec  senaeng.com.

     Entretanto, se tiver sugestoes na medida de como podemos melhorar esta
newsletter, e o seu site, queiram fazer o favor de me contactar
directamente.

Melhores cumprimentos,
Antsnio Sirgio Sena, Editor



Artigos de Interesse

# Domisticos poderco produzir energia para consumo prsprio


Digital power-conversion schemes fit ultraportable applications -
Understanding and choosing the right power supply topology--analog versus
digital--is key to battery-constrained designs.

Microsoft, Alcatel, IBM and HP Push Internet TV - Internet protocol
television got a massive boost today when Alcatel and Microsoft announced a
global deal with HP for servers that will support the next generation of
television.

India tries to get its fab groove going - India has no problem attracting
companies to settle there for semiconductor design, but getting companies to
invest in leading-edge chip plants there has been a different story. Is that
changing?

Can home automation break out? - SmartHome CEO and founder Joe Dada thinks
the home automation market is poised to penetrate the long-sought mass
market. Listen to Dada describe what will make it explode.

WAFS: The New Approach to Remote File Access - Remote plants often need data
immediately, but it's rarely easy to share files stored elsewhere. Wide Area
File Services address age-old problems of remote CAD/CAM teams, making
rapidly changing information available simultaneously at any number of sites
using virtually no bandwidth.

Thermal Management Selection Guide

Tech Tutorial: Slide switches boost automotive design flexibility - Slide
switches offer designers of automotive electronic systems more options (such
as wiping contacts and constant contact force) along with lower cost,
compared to snap-action, sub-miniature switches.

Save power with DSPs - It is important to understand how to minimize power
consumption and take advantage of idling unused peripherals.

Achieve thermal protection of electrical enclosures with vortex cooling - A
vortex cooling enclosure cooler uses a vortex tube to convert a filtered,
compressed air supply into refrigerated air without the use of electricity,
ammonia or other refrigerants.

The art of capacitive touch sensing - Take advantage of no-moving-part
user-interface switches based on electrical fields and cpacitiance changes,
with the right sensor


Novos Componentes

Duo-Sensor UV Hazard Meter - Gigahertz-Optiks has introduced the X1-1
hand-held meter which operates and displays separate UV-C/B, UV-A detector
measurements as well as calculate and display the sum of the two detector
readings.

Tiny Temperature Sensors for Remote Systems

Sensing and Monitoring for Control and Protection Seminar 99

Maxim/Dallas HIGH-SPEED ADCs AND DACs Design Guide: 10th Edition

NEW 2Q 2006 Power Management Selection Guide

Wireless ICs Solutions Bulletin

Analog Dialogue (May 2006) features Power Supply Management?Principles,
Problems, and Parts.



Eventos

Sensors Expo & Conference
June 5-7, 2006
Donald E. Stephens Convention Center
Rosemont, Illinois



Ideia de Montagem, circuito experimental

What Is an iButton? -  This application note is a broad introduction to the
iButton. It discusses the iButton basics: what it is, how it is constructed,
and some of its applications. It explains how a system can communicate to
the iButton through its 1-Wire interface. The note also describes: types of
iButtons; iButton durability; its guaranteed unique 64-bit serial number;
and available iButton accessories.

Microcontroller timer solution cuts the cost of motor control applications

How to design a dimming fluorescent electronic ballast - Dimming fluorescent
lamps is an attractive feature that provides mood and brightness effects as
well as having tremendous energy savings potential. But how can you design
one. It is a difficult task that requires knowledge of fluorescent lamp
electrical behavior, control theory experience and resonant converter design
skills. Learn how with this article.

Strategies for minimizing resistor-generated noise - "Simple" passive
components may not get the attention that more complex components do, but in
some applications, resistor selection has a significant effect on system
performance.


Building a 1-Wire Temperature Logger Using the MAXQ3210  - This application
note describes a temperature logging application using the MAXQ3210
microcontroller and the DS1822 1-Wire Digital Thermometer. Temperature
values are logged into the MAXQ3210's internal EEPROM for later download and
analysis.

Microcontroller delivers voltage-multiplied dc power - Use the
microcontroller's comparator and PWM blocks to form a simple inductor-based
boost converter.

Designing Ideas: The cascode circuit - This fortnight's exposition of Design
Ideas kicks off with another application of the cascode circuit.

Microcontroller simplifies battery-state-of-charge measurement - Monitor
battery status for renewable energy systems.



Emprego!

     Fagam-nos chegar as vagas de emprego para as areas de Engenharia
Elictrica e/ou Electrsnica, que faremos por as publicar.



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