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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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on 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 will open this relay for approximately 5 seconds after which it will reset itself.
2. A Tampe..................[:=> 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 circuit diagram with details on ..................[:=> 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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s motion into an electric signal. The motion detector may be electrically connected to devices such as security, lighting, audio alarms, and the like. Motion sensors are used in a wide variety of applications and as a result many different types of motion sensors are available. Motion detectors are mainly used in for security systems. For example, motion detectors are typically positioned near exterior doorways or windows of a building for monitoring the area around the building. Upon detecting motion, they generate an electrical signal that is transmitted to a preselected audible alarm or lig..................[:=> 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 ..................[:=> 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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olt supply from the panel.


Circuit description
The circuit uses a matched pair of 40 kHz transducer elements to detect movement up to 22 feet away. Crystal locked circuit for maximum stability. An LED is switched on for movement indication. The transmitter sends out a steady ultrasonic signal at 40kHz( wavelength ~= 6 mm).
The reflected sound is detected by ultrasonic receiver. The
signal is then amplified by amplifiers.An amplifier is selfbiasing. The time constant of the first amplifier is set to let the 40kHz signal through. Between
the first & second amplifier there is a..................[:=> 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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ty of sound exceeds certain intensity, the alarm is
triggered and the siren begins to operate. The speaker beeps and the flasher
(light) flashes. Thus the owner of the residence is alerted when an intruder comes.

The functional block diagram includes
-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 ..................[:=> 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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but me cannot hear them, these very high sounds are called ultrasounds or ultrasonics. Imagine you are standing in a street and a police car or some other emergency service vehicle is speeding towards you. As it passes the sound of the siren seems to change. The reason tor this is because sound waves travel at a finite speed (700mph approx) regardless of the speed of the sound source. In effect as the source moves towards you the sound waves are compressed and sound higher, on the other hand, as the source moves away the sound waves are expanded and sound lower. This phenomenon is known as th..................[:=> 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 DETECTOR'.PLEASE give me i..................[:=> Show Contents <=:]



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