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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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zes two different types of technology, PIR and microwave technology. Microwave technology picks up any movement within the range of the microwave sensor, whereas PIR only picks up heat movement. Microwave PIR sensors alarm upon valid signals from both the PIR and the microwave sensors. This gives these sensors greater reliability and makes them less likely to trigger a false alarm from environmental disturbances. These devices require accurate adjustment for proper operation.
Passive-Infra-Red Motion Sensor
 Passive-infra-red (PIR) motion sensors are used to protect large open area..................[:=> 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 wit..................[:=> 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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o the image co-ordinate frame. If the PSD has a relative motion with respect to the beacon, the current envelopes are modulated by that relative motion and this modulation is analogous to amplitude modulation (AM). Thus the currents can be written as follows,
Ik(t) = (Ak.Cos(2 .pi .fc .t).(1+mk(t)))+nk _______________(3)
where k = 1,2,3, and 4 and it corresponds to the terminal number of the PSD, and Ak is the amplitude of the current waveform generated at the kth terminal of the PSD by the beacon that is fixed with respect to the PSD sensor. The function mk(t) denotes the signal envelope ..................[:=> 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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sor area. It is defined and measured with respect to a reference plane within the chip.
The electric field is set up between the reference plane and a thin layer of highly conductive saline liquid that resides at the interface of the living skin tissue and the dead skin. The saline layer has same shape as the living tissue- the shape of the fingerprint. Being highly conductive, it imposes its shape as a boundary condition on the field, thereby spatially modulating the field into an analog of the fingerprint.
An array of tiny antenna arranged in a square matrix of 96 rows and columns does t..................[:=> 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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ased 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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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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noise reset without adding any lag. Pseudo-flash reset requires separating VRST from VDD, while the other two techniquies add more complicated column circuitry. Specifically, pseudo-flash reset and hard-to-soft reset both add transistors between the pixel power supplies and the actual VDD. The result is lower headroom, without affecting fill factor.

Active reset

A more radical pixel design is the active-reset pixel. Active reset can result in much lower noise levels. The tradeoff is a complicated reset scheme, as well as either a much larger pixel or extra column-level circuitry.


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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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omotive 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 used almost exclusively on gasoline burning, EFI (electronic fuel injection) engines. Both sensor d..................[:=> Show Contents <=:]



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