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Title: shadow sensor alarm using 555 timer
Page Link: shadow sensor alarm using 555 timer -
Posted By: sreemon
Created at: Thursday 17th of August 2017 06:20:36 AM
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shadow sensor alarm using 555 timer

This shadow alarm circuit can sense a moving shadow in a confined area. It can be used to protect things from theft. When somebody approaches the unit, it will give a loud alarm to abort the attempt of theft. The circuit uses the light sensing property of the Photo diode.

The circuit uses the light sensing property of the PIN Photodiode. The p-n junction of the photo diode gives light current when it is forward biased. IC1 is designed as a voltage comparator. Its non inverting input is connected to a potent ....etc

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Title: light sensitive alarm project using 555 timer project report
Page Link: light sensitive alarm project using 555 timer project report -
Posted By: Avinash
Created at: Thursday 17th of August 2017 04:32:21 AM
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Title: burglar alarm using 555 and ldr
Page Link: burglar alarm using 555 and ldr -
Posted By: nehamishra12
Created at: Thursday 05th of October 2017 04:40:05 AM
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hai i need material related to burglar alarm using 555 and ldr. i kindly request u to send me the required material for poject. ....etc

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Title: Rely and electromagnetism burglar alarm alternating switching and oscillating
Page Link: Rely and electromagnetism burglar alarm alternating switching and oscillating -
Posted By: [email protected]
Created at: Thursday 18th of January 2024 10:42:11 PM
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Rely and electromagnetism burglar alarm alternating switching and oscillating ....etc

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Title: advantages and disadvantages of burglar alarm circuit using 555 timer
Page Link: advantages and disadvantages of burglar alarm circuit using 555 timer -
Posted By: sivam
Created at: Thursday 17th of August 2017 04:59:42 AM
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In the past, hardwired alarm systems are the only choice for customers who need security equipment to protect premises. Today, with rapid technology evolve, many users shift from hardwired alarm to wireless alarm. It seems home security industry is moving from hardwired to wireless, but as one of mature and stable alarm equipment, some users still favor the hard wired alarm system. In this article, we will show you some basic information about advantages and disadvantages of hardwired alarm systems.

What s hardwired alarm system ?

Alarm ....etc

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Title: mini project on light sensitive alarm with timer 555 in details report
Page Link: mini project on light sensitive alarm with timer 555 in details report -
Posted By: sreedhar
Created at: Thursday 17th of August 2017 06:42:18 AM
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to get information about the topic light sensitive alarm with timer 555 full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-light-sensitive-alarm ....etc

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Title: how to make burglar alarm using 8051 microcontroller
Page Link: how to make burglar alarm using 8051 microcontroller -
Posted By: ak9948560132
Created at: Thursday 05th of October 2017 04:43:21 AM
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To get full information or details of how to make burglar alarm using 8051 microcontroller please have a look on the pages

http://circuitstodayinterfacing-pir-sensor-to-8051

http://circuitstodaysimple-burglar-alarm-circuit

http://circuitsgallery2014/11/home-automation-and-security-system-using-microcontroller.html

if you again feel trouble on how to make burglar alarm using 8051 microcontroller please reply in that page and ask specific fields in how to make burglar alarm using 8051 microcontroller ....etc

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Title: project report submitted on continuous alarm generation using 555 timer and a relay
Page Link: project report submitted on continuous alarm generation using 555 timer and a relay -
Posted By: mukesh singh gwal
Created at: Thursday 05th of October 2017 05:34:32 AM
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I made an alarm using LDR(light dependent register). The alarm work depending on the light intensity, when light intensity will low then the alarm will rise up and when the light intensity will high then it remain off. My problem is that the buzzer is not playing continuously when the intensity is low. I need a continue beep and a reset button to reset the device and also the alarm.
Sorry, for my bad English. ....etc

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Title: burglar alarm system using ic 555 and ldr pdf
Page Link: burglar alarm system using ic 555 and ldr pdf -
Posted By: baladari
Created at: Thursday 17th of August 2017 05:53:04 AM
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The circuit illustrated here is used as Burglar alarm. LDR is kept at such a place that when thief enters our house then a shadow will fall on the LDR. A small beam of light source is also needed to supply continuous signal to LDR. For best Light source we can use Laser diode which will work for few km. For home use Infra Red LED s will be good and will be tricky to thief and works with same efficiency at night.

This circuit uses a popular timer I.C which is 555. I.C 555 is connected as comparator with pin 6 connected with positive supply, t ....etc

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Title: anti sleep alarm for students mini project using 555 timer
Page Link: anti sleep alarm for students mini project using 555 timer -
Posted By: vinaya
Created at: Thursday 05th of October 2017 03:43:47 AM
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To get full information or details of anti sleep alarm for students mini project please have a look on the pages

http://seminarsprojects.net/Thread-antisleep-alarm-for-students

if you again feel trouble on anti sleep alarm for students mini project please reply in that page and ask specific fields in anti sleep alarm for students mini project ....etc

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