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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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r than the Hawkeye, and not very attractive.
 It does however have larger batteries, and better range of ‘field’, as well as transmitter distance.
 It never sends an OFF command, but does send an ON command every 25 seconds or so as long as motion continues.
 Example: Area Sensor
 An outdoor motion sensor detects a ‘warm’ body moving across an area. It automatically turns on the lights, and sends a message that announces the event.
 The most frequent use of the PIR sensor
There are two events:
1. Local Event. It would be one like someone stepping on a floo..................[:=> 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 ..................[:=> 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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D with the frequency fc at the four terminals of the PSD sensor. Therefore, all the four currents can be processed in a similar fashion to estimate the amplitudes of the carrier waveforms. The amplitudes of these currents are related to the azimuth and elevation of the light source with respect to 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)))+..................[:=> 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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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 the actual sensing. Located above the reference plane, the array measures about 6.5mm on a side, giving the sensor a linear resolution of about 15 pixels per millimeter.
The sensed analog electric field values are scanned from the sensor matrix a row at a time, digitized, and sent f..................[:=> 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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ing Scrutinizing information using Wireless System
aaa. NBLC Wireless Communication Based Data Reception System
bbb. NBLC Wireless Bus Stop Information Provider System for Passengers
ccc. NBLC Vehicle Accident Prevention using EYE Blink Sensor using Wireless communication
ddd. NBLC Wireless Bus Information System for Blind People
eee. NBLC Accident Prevention using EYE Blink & ultrasonic
fff. NBLC Advanced Encryption & Decryption Standard using Rf
ggg. TECHNOLOGY: EMBEDDED (ATMEL)
hhh. DOMAIN: RF-ID BASED PROJECTS
iii. NBLC Automated & Unmanned Railway gate Crossing using RFID reader
..................[:=> 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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ated, an..................[:=> 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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sumer applications such as camcorders as well as for broadcast cameras, where they were displacing video camera tubes.

Eric Fossum, et al., invented the image sensor that used intra-pixel charge transfer along with an in-pixel amplifier to achieve true correlated double sampling (CDS) and low temporal noise operation, and on-chip circuits for fixed-pattern noise reduction, and published the first extensive article predicting the emergence of APS imagers as the commercial successor of CCDs. Between 1993 and 1995, the Jet Propulsion Laboratory developed a number of prototype devices, whic..................[:=> 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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mass airflow sensor is used to determine the mass of air entering the 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 desig..................[:=> Show Contents <=:]



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