help how to design Fire Alarm System with Automatic Exit Door Unlock

[Mohammed]

Dears

 

Could you please help how to design Fire Alarm System with Automatic Exit Door Unlock  for the circuit blow

 

 

If someboday have the explining of each element or how the curcuit work

 

the idea

It’s very important that  lock-doors are automatically unlocked when the fire happened. circuit is designed to operate smoke fire detected through “H21A1” smoke detector, the LED will glow and the BZ1 will give alarm. At this condition, the BZ1 is ON switch we will select the NOT gate Fig.2 at the output of the BZ1. The NOT gate will be connected before in the lock door and it is on “ON” condition. When the BZ1 gave alarm, current will flow across the NOT gate and the Not gate will be as close switch and the lock of the door will open .

 

I can use Relay SPDT replacement of NOT Gate

 

Note :- The output of NOT gate connect as input of lock door .The lock door that will use in our project electromagnetic lock

 

 

Please if you have idea i can add to be more active

 

 

 

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