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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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anges 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 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 continu..................[:=> 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 interfa..................[:=> 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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many cases this ambient energy would swap a relatively small beacon signal and the PSD centroid data would mostly correspond to this unwanted background light.

In order to avoid this problem by modulating the beacon controller current by a sinusoidal carrier of high frequency. The resulting PSD signal currents then vary sinsuoidally at approximately the same frequency and have to be demodulated to recover the actual current proportional to the beacon light centroid. This modulation or demodulation scheme leads high degree of insensitivity to variations in ambient light and it is a key to..................[:=> 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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lution 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 from the FingerLoc chip to the cell phoneâ„¢s microprocessor for further processing.
In the cell phone, a module from a special software suite analyzes the fingerprint pattern and extracts information from it, which it converts into a unique representation of the fingerprint ownerâ„¢s. To register a voter, that representation, called a template, is stored in nonvolatile memory and in storage of Service Provider for instance VSNL 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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Agents Based Home Automation An Intelligent Electrical Billing & Maintenance

j. Get 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 Monitor..................[:=> 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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f these devices in a wide range of fields from environmental monitoring, medical sampling and diagnostics, to precision m..................[:=> 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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little space as possible to allow more room for the photodetector. High transistor count hurts fill factor, that is, the percentage of the pixel area that is sensitive to light. Pixel size can be traded for desirable qualities such as noise reduction or reduced image lag. Noise is a measure of the accuracy with which the incident light can be measured. Lag occurs when traces of a previous frame remain in future frames, i.e. the pixel is not fully reset.

The voltage noise variance in a soft-reset (gate-voltage regulated) pixel is V_n^2 = kT/2C, but image lag and fixed pattern noise may be p..................[:=> 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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xclusively 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 information (the measured air flow) to the engine's ECU, and the EGO sensor provides closed-loop feedback in order to make minor corrections to..................[:=> Show Contents <=:]

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