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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: 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
Page Link: Light-sensitive Alarm Project -
Posted By: venkateswrar reddy
Created at: Thursday 05th of October 2017 04:00:40 AM
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The circuit detects a sudden shadow falling on the light - sensor and sounds the bleeper when this happens. The circuit will not respond to gradual changes in brightness to avoid false alarms. The bleeper sounds for only a short time to prevent the battery running flat. Normal lighting can be used, but the circuit will work best if a beam of light is arranged to fall on the light-sensor. Breaking this beam will then cause the bleeper to sound. The light sensor is an LDR (light-dependant resistor), this has a low resis ....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: traffic light controller using 4017 ic and 555 timer ic
Page Link: traffic light controller using 4017 ic and 555 timer ic -
Posted By: akash
Created at: Thursday 05th of October 2017 04:27:50 AM
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need ppt of traffic light controller using 4017 ic and 555 timer ic
need ppt of traffic light controller using 4017 ic and 555 timer ic ? ....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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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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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: how ic 4017 and 555 timer works in traffic light controller
Page Link: how ic 4017 and 555 timer works in traffic light controller -
Posted By: rajita
Created at: Friday 01st of September 2017 11:08:09 PM
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Title: automatic street light controller project using 555 timer free download
Page Link: automatic street light controller project using 555 timer free download -
Posted By: divine das
Created at: Thursday 05th of October 2017 04:06:45 AM
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