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ultrasonic motion detector schematic


Posted by: seminar presentation
Created at: Saturday 29th of May 2010 06:38:04 AM
Last Edited Or Replied at :Saturday 29th of May 2010 06:38:04 AM
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aves are expanded and sound lower. This phenomenon is known as the Doppler Effect after the person who first discovered it in 1845.
The wiring of motion detectors is a relatively easy task as you can see below. The diagram shows a unit with the cover removed to reveal a terminal block for the connections to the control panel. These consist of:
1. A Normally Closed Alarm Relay. When the detector is stable (no movement) then this relay is closed. This is connected to the appropriate alarm zone at the panel and hence the alarm loop will be closed. If however the detector senses movement then it..................[:=> Show Contents <=:]



noise alarm mini project with circuit diagram


Posted by:
Created at: Tuesday 28th of February 2012 09:30:05 AM
Last Edited Or Replied at :Tuesday 28th of February 2012 09:30:05 AM
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I'am a second year engineering student I want ci..................[:=> Show Contents <=:]



The ultrasound motion detection sensor


Posted by: seminar class
Created at: Tuesday 12th of April 2011 12:12:10 AM
Last Edited Or Replied at :Tuesday 12th of April 2011 12:12:10 AM
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ected waves and produces a reception signal. By detecting the Doppler shift in the reflected signal, the detector circuitry detects whether a moving object is present in the area. Typical applications include intruder alarms and automatic door openers, for which a unit of conventional construction comprises a gunn diode oscillator mounted in a cavity resonator such as a simple waveguide tube. However, Doppler radar-based motion detectors are disadvantageous because of limited materials penetration, microphonics, frequency crowding, and poor short-range operation.
Ultrasonic Movement De..................[:=> Show Contents <=:]



PIR SENSOR BASED MOTION DETECTION SYSTEM FOR SECURITY


Posted by: sarathpradeep
Created at: Sunday 23rd of January 2011 06:48:16 AM
Last Edited Or Replied at :Tuesday 01st of February 2011 07:06:22 AM
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Hi i am Sarath pradeep, 3rd yr ECE student. I need the full detail including diagrams and programs abt the topic PIR SENSOR BASED MOTION DETECTION SYSTEM FOR SECURITY..................[:=> Show Contents <=:]



ultrasonic motion detector schematic


Posted by: seminar presentation
Created at: Saturday 29th of May 2010 06:38:04 AM
Last Edited Or Replied at :Saturday 29th of May 2010 06:38:04 AM
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lt False triggering is easly caused by reflections from blowing curtains, pets, and flying insects.

its is a popular device for detecting motion in a free space. it is not as versatile as the passive infra-red type mainly due to its restricted range, usually only about 9 meters max. It can be used in situations and environments which mould be unsuitable for the infra-red type as it is not affected by temperature chances.The human ear can hear sounds of frequencies between 20Hz and 20KHz (20,000Hz). Sound waves do exist above 20KHz but me cannot hear them, these very high sounds are called u..................[:=> Show Contents <=:]



Simple Sound Activated Burglar Alarm System


Posted by: Sidewinder
Created at: Saturday 15th of May 2010 10:47:40 PM
Last Edited Or Replied at :Tuesday 12th of October 2010 04:39:07 AM
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-MICROPHONE
-AMPLIFIER
-LATCH
-OSCILLATOR
-FLASHER
-SPEAKER

a 600O unidirectional moving coil microphone is used. LM386 CMOS operational amplifier was the main component in the amplifier. It had a gain of 200. The amplifier then passes it on to the latch section of the burglar alarm circuit for further processing. The CD4013B dual D-type flip-flop is a
monolithic complementary MOS (CMOS) integrated circuit. It has the inputs D, Q,QBAR The logic level present at the ?D? input is transferred to the output during the positive-going transition of the clock pulse. Setting or resetting is i..................[:=> Show Contents <=:]



Ultrasonic Motion Detector


Posted by: computer science technology
Created at: Thursday 28th of January 2010 08:06:38 PM
Last Edited Or Replied at :Thursday 28th of January 2010 08:06:38 PM
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he detector senses movement then it will open this relay for approximately 5 seconds after which it will reset itself.
2. A Tamper Switch Output. This is closed until the cover is removed and is connected to the tamper circuit at the control panel.
3. 12VDC Sup..................[:=> Show Contents <=:]



ULTRASONIC MOVEMENT DETECTOR


Posted by: kesavaram447
Created at: Thursday 24th of December 2009 06:44:07 AM
Last Edited Or Replied at :Saturday 23rd of April 2011 02:07:24 AM
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please send me abstract and full report for the project 'ULTRASONIC MOVEMENT DETECTO..................[:=> Show Contents <=:]



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