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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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, the motion of an approaching car, a person’s body heat, or even changes in humidity or barometric pressure
 Purpose: to detect the presence of some ‘body’.
Dual Technology Motion Sensor
 The dual technology motion sensor utilizes 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 le..................[:=> 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 a..................[:=> 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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ents 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 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..................[:=> 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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next depends on how the cell phone manufacturer and service provider have set things up. If the handset does not recognize the applicant, service will be denied. It gets more interesting when the system does recognize the fingerprint, because each user can have a stored profile, which personalizes the phone for him or her.
The above explanation for FingerLoc sensor is being depicted in the next page diagram




Strength of SMS :
SMS “ Short Messaging Services is a new global language that evolved in the faceless communication.
DO U KNOW
¢ 15 billion character-based m..................[:=> 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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. Optimized Autonomous Space In-situ Sensor-Web for Volcano Monitoring

q. A mobile web grid based physiological signal monitoring system

r. Bluetooth/GMRS Car Security System with a Randomly Located Movement Detect Device

s. Bluetooth Based Wireless Remote Device Controlling and Data Acquisition

t. Bluetooth Remote Control

u. Application of Bluetooth technology in ambulatory wireless medical monitoring

v. A Remotely Controlled Bluetooth Enabled Environment

w. Coupling between Bluetooth modules inside a passenger car

x. Remote-controlled home automation system vi..................[:=> 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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cessful in producing a wide range of miniature sensors and mechanical devices. Of particular interest is the application of this technology to biological systems. For instance an immunobiosensor for a bacterial food toxin with a sensitivity of 1 ng/mL and miniature reaction chambers have been fabricated for DNA analysis 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 work..................[:=> 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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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 resulted in the creation of the active-pixel sensor. Noble in 1968 and Chamberlain in 1969 created sensor arrays with active MOS readout amplifiers per pixel, in essentially the modern three-transistor configuration. The CCD was invented..................[:=> 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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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 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 ex..................[:=> Show Contents <=:]



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