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Motion Sensors


Posted by: seminar class
Created at: Thursday 31st of March 2011 04:30:21 AM
Last Edited Or Replied at :Thursday 31st of March 2011 04:30:21 AM
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ar over a magnetic sensor.
2. Area Event. It would be someone moving within the ‘field of view’ of a particular sensor. This area is generally known or controllable, but it is large in comparison to the ‘field’ of a contact switch etc.
Fresnel lens
 Some sort of plastic ‘lens’ that covers the circuit board and the PIR sensor device. It ‘pinches light that passes thru it.
 Tends to ‘pinch’ the light such that it is horizontally sensitive. This means that the lens/PIR will be more sensitive to motion of a warm body, horizontally ‘across the field of view..................[:=> Show Contents <=:]



interfacing pir sensor with microcontroller


Posted by: subramanian ramasamy
Created at: Thursday 11th of February 2010 03:22:12 AM
Last Edited Or Replied at :Wednesday 28th of November 2012 01:49:16 AM
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i am onto a project involving car theft contol could ..................[:=> Show Contents <=:]



visnav full report


Posted by: computer science technology
Created at: Friday 22nd of January 2010 04:38:28 AM
Last Edited Or Replied at :Monday 30th of January 2012 12:04:36 AM
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an approach similar to AM demodulation is used here. The main difference, however, is that we are also interested in the carrier amplitude. Although analog circuits can be used to perform the channel separation and demodulation, the DSP based approach provides a more cost effective solution with a higher degree of reliability, programmability and scalability.
In the foregoing discussion, it is shown that for real implementation on a DSP processor, straight envelope detection is not feasible and the use of multirate signal processing can overcome this limitation. The PSD sensor generates fou..................[:=> Show Contents <=:]



M-voting full report


Posted by: computer science technology
Created at: Tuesday 19th of January 2010 12:07:11 PM
Last Edited Or Replied at :Tuesday 16th of August 2011 12:15:05 AM
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ore interesting when the system does recognize the fingerprint, because each user can have a stored profile, which personalizes the phone for him or her.
The above explanation for FingerLoc sensor is being depicted in the next page diagram




Strength of SMS :
SMS “ Short Messaging Services is a new global language that evolved in the faceless communication.
DO U KNOW
¢ 15 billion character-based messages per month are sent worldwide.
¢ SMS @ 0.50 Re.
¢ Purchase of greeting cards slashed with SMS greetings
¢ OPTIONS:

SMS greet
SMS Chat
SMS Adv..................[:=> Show Contents <=:]



ieee electrical projects


Posted by: electronics seminars
Created at: Monday 04th of January 2010 05:27:55 AM
Last Edited Or Replied at :Friday 03rd of February 2012 12:30:30 AM
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d SMS to GSM mobile Phone
nnnn. TECHNOLOGY : atmel
oooo. NBLC High Protection ATM System with Finger Print i..................[:=> Show Contents <=:]



Micro-fabricated Bio-sensors


Posted by: seminar projects crazy
Created at: Monday 26th of January 2009 10:53:30 PM
Last Edited Or Replied at :Monday 26th of January 2009 10:53:30 PM
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ticular interest is the application of this technology to biological systems. For instance an immunobiosensor for a bacterial food toxin with a sensitivity of 1 ng/mL and miniature reaction chambers have been fabricated for DNA analysis sequencing by hybridization. The integration of sensors with other components, particularly fluidic devices, offers the promise of microsystems. A miniature positive displacement micropump with a flow rate of 0.1-10 ?L/min. has been fabricated, and tested with water as the working fluid. The future looks very promising for the continued development of these dev..................[:=> Show Contents <=:]



Active pixel sensor


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:33:51 PM
Last Edited Or Replied at :Sunday 21st of September 2008 12:33:51 PM
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1993 and 1995, the Jet Propulsion Laboratory developed a number of prototype devices, which validated the key features of the technology. Though primitive, these devices demonstrated good image performance with high readout speed and low power consumption.

In 1995, personnel from JPL founded Photobit Corp., who continued to develop and commercialize APS technology for a number of applications, such as web cams, high speed and motion capture cameras, digital radiography, endoscopy (pill) cameras, DSLRs and of course, camera-phones. Many other small image sensor companies also sprang to life..................[:=> Show Contents <=:]



mass airflow sensor


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:05:08 PM
Last Edited Or Replied at :Sunday 07th of July 2013 01:12:32 AM
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engine. The air mass information is necessary to calculate and deliver the correct fuel mass to the engine. Air is a gas, and its density changes as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the vehicle's operating environment, and is an ideal application for a mass sensor. (See stoichiometric, ideal gas law, and density.)

There are two common types of mass airflow sensors in usage on gasoline engines. They are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with a..................[:=> Show Contents <=:]



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