Arduino controlled fire alarm system

Discussion in 'Embedded Systems and Microcontrollers' started by bwilliams60, Dec 6, 2015.

  1. bwilliams60

    Thread Starter Active Member

    Nov 18, 2012
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    Does anybody have a decent Arduino based fire alarm circuit? I want to take, say four basic fire alarms and make it so that if one of them goes off in my basement, the controller can send an audible alarm to a base upstairs and indicate which zone the alarm is occuring in. Any ideas. His would all be new to me but I follow instructions very well and have all the tools I need.
     
  2. shteii01

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    Feb 19, 2010
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    Use temperature sensor to detect the "fire"/abnormal high temperature?
     
  3. shteii01

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    Feb 19, 2010
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    Uno has 5 or 6 ADC. You can hook up 4 analog temperature sensors like LM35/TMP36. Each of them will go to specific ADC pin. So temp sensor 1 goes to ADC pin 1 is Zone 1. Temp sensor 2 goes to ADC pin 2 is Zone 2. And so on.

    Tutorial for Arduino board, code included: https://learn.adafruit.com/tmp36-temperature-sensor/overview
     
  4. spinnaker

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    Oct 29, 2009
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    If it is heat you are detecting for a fire alarm then you are already dead after the alarm goes off. You need to detect smoke and CO2 . I would not be trusting my life on a circuit I designed.

    An Arduino is way over kill for this application IMHO. Stick a baby monitor in the basement and you will know when smoke detectors go off.

    Also there are smoke detectors with a binary output if you really wanted to monitor them with a MCU.
     
  5. bwilliams60

    Thread Starter Active Member

    Nov 18, 2012
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    What I want to do is pick up on the signal from the smoke detector when it goes off. I figure the moment it sends out an audible alarm, there has to be current movement so I would like to use that to trigger another audible alarm upstairs and notify me as to what zone it is occurring in. Hope that clears it up.
    I do not want to use heat because as someone else said, it would be too late, I want the alarms to do what they are designed for. I just want to add on to that.
     
  6. spinnaker

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  7. mcgyvr

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    Oct 15, 2009
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    You want to use smoke detectors with some sort of "relay output" capability that you could tie into..
    Or a listed accessory device that ties into the interconnect wiring and provides relay output..

    Note: Do NOT "hack" into a smoke alarm for fear of voiding any insurance claims in the event of a fire..
     
  8. spinnaker

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    Similar to what I posted. They are wireless now. Back in the day they were wired. I remember doing maintenance at the Bremerton Navel Hospital. I was in the hallway when a nurse dropped some alcohol. The fumes tripped the smoke alarm, the computer picked up the alarm and closed a fire door. The fire door was heavy enough to give a patient in a wheelchair a bit of a nudge rolling him a couple of inches down the hallway. Boy was he surprised.
     
  9. nerdegutta

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    Dec 15, 2009
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    How about a sound triggered switch? Then there's no need to even touch the detector.
     
  10. spinnaker

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    What I was thinking. I said keep it simple and use a baby monitor.
     
  11. bwilliams60

    Thread Starter Active Member

    Nov 18, 2012
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    Good ideas guys. Great thought on hacking the fire alarm. Never thought about warranty. Thanks for the heads up.
     
  12. mcgyvr

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    Yep.. No need inventing/cobble anything..
    Valid smoke alarm/fire system interfaces are already established..
    Simply use whats already the "standard" and feed it into an Arduino all you want..
     
  13. djsfantasi

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    Apr 11, 2010
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    Also, remember that fire/smoke alarms contain a tiny bit of radioactive material, which may not be so nice if released accidentally while hacking.
     
  14. Brownout

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    Jan 10, 2012
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    What an odd statement from someone named "mcgyvr"
     
  15. mcgyvr

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    Oct 15, 2009
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    sometimes whats proven is best... in a safety device for sure..
     
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