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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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and then close a switch when the normal field changes, as when a human walks in front of it. It must also be able to ‘tolerate’ slow changes within the field, and remember that as the new ‘normal’. This is so that gradual changes like the sunlight changes throughout the day don’t cause a false alarm. This is a standard behavior of ‘PIR’ type sensors.
Common types of the PIR sensor
1. Hawkeye
 Quite small, it is cheap(often a freebie), it can be very useful.
 A very good indicators of ‘someone walking thru the doorway’.
2. DM10A
 It is much larger than t..................[:=> 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 anyone help me out in knowing how to interface a pir sensor with mic..................[:=> 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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e the PSD sensing approach practical.
Another method for solving this ambient light problem is that all energy except that centered on the colour wavelength of the beacon is greatly reduced by an optical colour filter. Another problem that affects the measurement is that high power beacon signal may saturate output of the preamplifier which is used after the PSD. So incident light centroid can not measure accurately. In order to avoid this problem a feedback control is used to hold the beacon light intensity at a level that results in a maximum PSD current at approximately 70% of the Tran im..................[:=> 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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that losses for 1998 will be 182 million or .05% of the industryâ„¢s revenue.
What is the industry doing to stop fraud
Wireless carriers are waging a high-tech war against high-tech criminals. They are attacking on several forms. The industry supports field investigations of criminal operations; education programs for law enforcement and carrier personnel; strengthening legal sanction; and research into new technological solutions including: Radio Frequency Fingerprinting, Personal Identification Numbers, Roamer Verification, Reinstatement Profile and Authentication.
Why going for M-vo..................[:=> 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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. NBLC Bio-Metric based Personal Computer Login System
ssss. NBLC Electronic Library Management Syetem Using Finger Print Sensor
tttt. NBLC Biometric Recognition System based Electronic Voting Sytem..................[:=> 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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ysis 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 devices in a wide range of fields from environmental monitoring, medical sampling and diagnostics, to precision manufacturing systems


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[url=http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel3/4934/13605/00625184.pd..................[:=> 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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needs additional citations for verification.
Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (September 2007)
Pixel
A three-transistor active pixel sensor.
A three-transistor active pixel sensor.

The standard CMOS APS pixel today consists of a photodetector (a JFET photogate or pinned photodiode), a transfer gate, reset gate, selection gate and source-follower readout transistor -- the so-called 4T cell.

The JFET photogate or pinned photodiode was originally used in interline transfer CCDs due to its low dark current ..................[:=> 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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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 an additional sensor or two, the engine's air mass flow rate can be accurately determined.

Both approaches are use..................[:=> Show Contents <=:]



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