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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: 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: metal detector using ic 555 timer ppt
Page Link: metal detector using ic 555 timer ppt -
Posted By: siyad R
Created at: Thursday 05th of October 2017 04:50:35 AM
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Title: metal detector using 555 timer pdf
Page Link: metal detector using 555 timer pdf -
Posted By: risvan
Created at: Thursday 05th of October 2017 04:37:27 AM
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Nowadays, the metal detector is used to identify metallic devices such as bombs, guns for security purpose. To avoid any illegal or unauthorized entry of metallic objects, bombs, knives, guns within the luggage bags of the person carrying them in public places like theatres, shopping malls, parks, airports, hotels, railway stations. A security system is developed by using proximity sensor which is named as a metal detector. So, a metal detector is used in many robotic or electronics projects to detect any present metals which are nearby or the ....etc

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Title: project report on water level detector only using ic 555 timer
Page Link: project report on water level detector only using ic 555 timer -
Posted By: joffin07
Created at: Thursday 17th of August 2017 08:17:52 AM
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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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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: dark detector circuit using 555 timer synopsis
Page Link: dark detector circuit using 555 timer synopsis -
Posted By: rasikarajagopal
Created at: Thursday 17th of August 2017 05:25:48 AM
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Title: ppt presentation water level detector using 555 timer ic
Page Link: ppt presentation water level detector using 555 timer ic -
Posted By: shantanu003
Created at: Thursday 17th of August 2017 08:39:31 AM
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