Tag Archives: electronics
Construction of Digital Respiration Rate Meter
An actual size, single side PCB for the respiration rate meter. The interface assembly simply make use of a nose mask, which is readily available in medical shops and mainly used in hospitals for supply for oxygen to the patients for respiration.
Take a 36cm long transparent glass tube with inner diameter of 5mm. Insert a thermocol ball, commonly used in flower bouquets. Make both the ends of the tube slightly narrow by heating them or putting a rubber tube of a smaller diameter inside. This is done to ensure that the thermocol ball does not come out during the inhale-exhale mechanism of the air.
Take a rubber cork and drill holes on its opposite sides at the center. Pass the glass tube through the center of the cork. Now drill holes on the sides of the cork and fix the transmitter and receiver so that these are placed face to face. Align the transmitter and receiver IR LEDs if required. This adjustment is required is depending upon the type of the glass tube used.
When you inhale and exhale air during respiration, this leads to movement of the ball left and right. Note down the displacement of the ball in the tube and move the cork to the center position of the displacement for more effective measurement.
Such an adjustment of cork postion is required depending upon the age group of the subject whose respiration rate is to be measured. For instance, as the displacement of the ball is less for children, the cork should be moved towards the connected mask.
For a healthy person the displacement of the ball is more, so you have to move the cork away from the mask.
Batteries that charge within seconds
Lithium ion batteries are the most common rechargeable batteries found in consumer electronics products. However these take a long time to charge. A new manufacturing method has been discovered that could lead to smaller, lighter lithium ion batteries can be charges in just seconds. The approach only requires simple changes to the production process of a well known material.
A prototype battery made using this technique could be charged in less than 20 seconds. It is used in most of the electronic products. I think my laptop contains lithium ion battery.
How to enter Communication chain?(what to study after 12th standard)
To qualify for an electronic engineering job, you need to be specialized either in electronics and communication engineering, electrical & electronics engineering or computer science engineering. On the technology side, there is place for degree holders, diploma holders or candidates with part time certification courses. You will find the most of engineering jobs can be bucketed under some wide categories.
For example, broadband network architects are people who provide IP network architecture solution to clients for the next generation network a network based on IP, ATM and SONET.
Network and application test engineers integrate verify and deploy a full service, high speed data network providing nationally distributed video, voice, local programming and data services.
Another important category is network management and architecture/system engineers. These people provide network management solutions to clients for currently planned deployments and next generation network technologies. A position may include focus on all aspects of operations support. A combination of business, telecommunication and computer knowledge is optimal.
Wireless engineers develop potential wireless data applications, technology intelligence to identify and track wireless data products and wireless data strategies. These also interact with vendors.
Bellheads are technocrats who understand switching, So ITI certificate or diploma is sufficient for this role.
Flat Panel Display TVs
The manufacturing build up in China for the consumer electronics (CE) 2009 Xmas season has started. Inventory drawdown from last year had an impact in the fourth quarter 2009 and the first quarter of this year so product volume in the major areas was down year to year.
However, it appears that the worst is over as demand for computers and Flat Panel Display TVs is showing more strength than would be expected on a seasonal basis. But the problems of the worldwide recession had caused some companies to reduce production and some shortages will occur over the next few months. These include DVD and CD drives (since optical pick-up heads are in short supply); HDD drives for notebooks and LCD glass panels.
PC demand is picking up in the consumer notebook area, which includes the new netbook category. The Macbook is particularly strong. Business demand for PC remains weak as business customer are waiting for the release of OS7 from microsoft.FPD for notebook PCs was up 35% Q/Q and netbook displays increased 85%. We expect PC sales to show positive Y/Y gains in the second half of 2009. Even the DRAM market is picking up, probably as a result of improving notebook sales.
The cell phone market is still in a state of technology transfer from traditional to smart phones. Apple (AAPL: 168.13 +2.82 +1.71%) sold a million new iPhones in the first weekend, dwarfing Palm’s (PALM: 13.491 +0.651 +5.07%) Pre sales. For the first three months the estimates of Pre sales vary over a wide range, from 150,000 to 300,000, with most recent reports estimating a balance between supply and demand for the Pre of about 40,000 a week.
Static phase converters and their different types
Static phase converters are used for operating three phase equipment with single phase power supply. With the help of a three phase generating rotary phase converter, you can operative three phase equipment from normal residential single phase power supply. Static phase converters operate by charging and discharging capacitors to temporarily produce a third phase of power for only a matter of seconds during the startup of electric motors. It then drops out forcing the motor to continue to run on just one phase.
Static phase converters do not actually convert single phase power into three phase power, nor do these generate three phase power. Due to their technology, they do not properly power a three phase machinery or equipment. They have limited utility as they are unable to power all types of machinery with three phase circuitry. They also reliability scale.
The performance of static phase converter is inferior to a true rotary phase converter built with a three phase generator that provides true three phase power.
