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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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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 floor mat which had a contact switch in it, walking through a light b..................[:=> 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 con..................[:=> 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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urrents 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)))+nk _______________(3)
where k = 1,2,3, and 4 and it corresponds to the terminal number o..................[:=> 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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ng 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-voting with Finger print sensing which are costly
They not only provide secured voting but also avoid fraud in cell tariff, call accessing, billing system etc., so it is necessary to have Finger print sensors in the mobile phones.
What other features can one look in for with fingerprint guarded Mobile Handset
Secured M-commerce, secured M-governance, Authentication, Priv..................[:=> 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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on Digital Bus to Substation Automation


k. Unified Architecture for Large Scale Attested Metering

l. a GSM mobile system to monitor brain function using a near-infrared light sensor

m. A gain scheduling strategy for the control and estimation of a remote robot via Internet

n. Smart companion

o. Open architecture for contactless smartcard-based portable electronic payment systems

p. Optimized Autonomous Space In-situ Sensor-Web for Volcano Monitoring

q. A mobile web grid based physiological signal monitoring system

r. Bluetoot..................[:=> 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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uidic 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


For More Read
External link
[url=http://72.14.235.132/search?q=cache:mIoMwh6_vF4J:www.wi..................[:=> 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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heir own amplifiers ? were being investigated as a solid-state alternative to vacuum-tube imaging devices. The MOS passive-pixel sensor used just a simple switch in the pixel to read out the photodiode integrated charge. Pixels were arrayed in a two-dimensional structure, with access enable wire shared by pixels in the same row, and output wire shared by column. At the end of each column was an amplifier. Passive-pixel sensors suffered from many limitations, such as high noise, slow readout, and lack of scalability. The addition of an amplifier to each pixel addressed these problems, and re..................[:=> 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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. 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 designs output a 0 - 5.0 volt signal that is proportional to the air mass flow rate, and both sensors have an IAT sensor (intake air temperature) incorporated into their housings.

When a MAF is used in conjunction with an exhaust gas oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop predicted air flow ..................[:=> Show Contents <=:]



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