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Title: Advanced Wireless system with Security System for Fire Safety with Alarm
Page Link: Advanced Wireless system with Security System for Fire Safety with Alarm -
Posted By: nelsonthomas
Created at: Thursday 05th of October 2017 03:49:47 AM
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Abstract:
It is an Intelligent IP based Intrusion Alarm with Home Automation Panel,to protect offices,home from hazards such as fire, theft, gun-point threat, and protecting safe deposit lockers/vaults, cash carrying mobile vans, ATM's etc. Shops and Establishments, especially jewellery shops to protect premises from hazards such as fire, theft, gun-point threat..etc, the connection is manly Wireless technology like Mobile phones,PDA, wireless internet,(WiFi),..etc ....etc

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Title: fire alarm using ldr pdf
Page Link: fire alarm using ldr pdf -
Posted By: norek
Created at: Thursday 17th of August 2017 06:47:08 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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Title: advantages of fire alarm using thermistor in pdf
Page Link: advantages of fire alarm using thermistor in pdf -
Posted By: veena_niit
Created at: Thursday 17th of August 2017 04:43:08 AM
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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: free download seminars project report on fire alarm
Page Link: free download seminars project report on fire alarm -
Posted By: aries2903
Created at: Thursday 17th of August 2017 08:38:35 AM
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Title: project report on fire alarm using ldr
Page Link: project report on fire alarm using ldr -
Posted By: motorola7434
Created at: Thursday 17th of August 2017 08:45:45 AM
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Title: abstract for fire alarm using thermistor
Page Link: abstract for fire alarm using thermistor -
Posted By: sweet_neha
Created at: Thursday 17th of August 2017 04:46:35 AM
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Title: free download project report of fire alarm
Page Link: free download project report of fire alarm -
Posted By: junky_funky44
Created at: Thursday 17th of August 2017 04:55:25 AM
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Title: advantages and disadvantages of a fire alarm using thermistor
Page Link: advantages and disadvantages of a fire alarm using thermistor -
Posted By: anjukrishnaj7
Created at: Thursday 17th of August 2017 05:05:33 AM
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fire alarm using thermistor
advantages and disadvantages
The IC1 (NE555) is configured as a free running oscillator at audio frequency. The transistors T1 and T2 drive IC1. The output (pin 3) of IC1 is couples to base of transistor T3 (SL100), which drives the speaker to generate alarm sound. The frequency of NE555 depends on the values of resistances R5 and R6 and capacitance C2. When thermistor becomes hot, it gives a low-resistance path for the positive voltage to the base of transistor T1 through diode D1 and resistance R2. Capacitor C1 ....etc

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