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Title: Simple Fire Alarm Circuit
Page Link: Simple Fire Alarm Circuit -
Posted By: smart paper boy
Created at: Saturday 18th of June 2011 07:23:09 PM
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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: future scope of laser security alarm
Page Link: future scope of laser security alarm -
Posted By:
Created at: Sunday 25th of September 2016 05:16:55 AM
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pls help me find future scope of laser security system ....etc
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Title: future scope infrared burglar alarm
Page Link: future scope infrared burglar alarm -
Posted By:
Created at: Thursday 07th of May 2015 01:45:55 AM
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Title: future scope of wireless charging of mobile phones using microwaves seminarprojects com future scope of wireless chargin
Page Link: future scope of wireless charging of mobile phones using microwaves seminarprojects com future scope of wireless chargin -
Posted By:
Created at: Tuesday 30th of October 2012 01:12:05 AM
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plz send me future scope of wireless charging of mobile phones using microwave
plz send me future scope of wireless charging of mobile phones using microwave ....etc
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Title: ppt on fire alarm using thermistor circuit
Page Link: ppt on fire alarm using thermistor circuit -
Posted By:
Created at: Wednesday 09th of January 2013 06:32:22 PM
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i want a doucument about fire alarm using thermester which gives me all information about this project. ....etc
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Title: future scope of laser security alarm
Page Link: future scope of laser security alarm -
Posted By:
Created at: Monday 02nd of October 2017 05:05:52 PM
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Title: fire alarm circuit doc
Page Link: fire alarm circuit doc -
Posted By:
Created at: Tuesday 20th of November 2012 08:02:44 PM
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Title: circuit diagram of fire alarm using microcontroller 8051
Page Link: circuit diagram of fire alarm using microcontroller 8051 -
Posted By: [email protected]
Created at: Thursday 31st of October 2013 06:51:33 PM
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yea. i am looking for circuit diagram as well as programme in assembly language for 8051 based fire alarm system. ....etc
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Title: fire alarm circuit doc
Page Link: fire alarm circuit doc -
Posted By:
Created at: Thursday 15th of November 2012 04:42:57 PM
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i need a document about the fire alarm circuit using thermister and ic555
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Title: fire alarm circuit using microcontroller 8051
Page Link: fire alarm circuit using microcontroller 8051 -
Posted By:
Created at: Monday 19th of November 2012 02:44:45 PM
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I urgently need a fire alarm circuit that detects heat using lm35 sensor(using adc to convert analog to digital) and after the temperature exceeds a said limit (say 50deg) the buzzer starts to buzz..please help urgently!!!! ....etc
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