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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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Title: Simple Fire Alarm Circuit
Page Link: Simple Fire Alarm Circuit -
Posted By: kolisagar48
Created at: Thursday 17th of August 2017 04:56:51 AM
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Simple Fire Alarm Circuit
Here is a simple fire alarm circuit based on a LDR and lamp pair for sensing the fire.The alarm works by sensing the smoke produced during fire.The circuit produces an audible alarm when the fire breaks out with smoke.
When there is no smoke the light from the bulb will be directly falling on the LDR.The LDR resistance will be low and so the voltage across it (below .6V).The transistor will be OFF and nothing happens.When there is sufficient smoke to mask the light from falling on LDR, the ....etc

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Title: investigatory project on fire alarm
Page Link: investigatory project on fire alarm -
Posted By: abhijit.dahiwalkar
Created at: Thursday 17th of August 2017 05:04:06 AM
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Please give the details of fire alarm project.How it will be written ,introduction etc. ....etc

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Title: project report on fire alarm
Page Link: project report on fire alarm -
Posted By: punit
Created at: Thursday 17th of August 2017 06:16:16 AM
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to get information about the topic fire alarm related topic refer the page link bellow

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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: 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: 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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Hi,am a college student doing a project on fire alarm using a thermistor. i humbly need your help in my project and your help will be much appreciated. i need advantages of using this kind of fire alarm. ....etc

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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: microcontroller based fire alarm system
Page Link: microcontroller based fire alarm system -
Posted By: seminar projects crazy
Created at: Thursday 17th of August 2017 04:45:05 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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To get full information or details of fire alarm using ldr please have a look on the pages

http://seminarsprojects.net/Thread-simple-fire-alarm-circuit

if you again feel trouble on fire alarm using ldr please reply in that page and ask specific fields in fire alarm using ldr ....etc

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