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Fire Alarm Circuit is a simple circuit that detects the fire and activates the Siren Sound or Buzzer. Fire Alarm Circuits are very important devices to REPORT SUPERINTENDENT OF FIRE ALARM . The fire alarm system is in first - class condition at the present writing . Oct. 19 , Box 22 , 12:30 p . m . The fire alarm operates to alert people to evacuate a location in which a fire or smoke accumulation is present. When functioning properly, a fire alarm will Apr 28, 2018 - FIRE ALARM PROJECT FOR CBSE CLASS 12 STUDENTS Completely made by me as it is not available on any of the websites. A notifying device is used to alert people that there is an alarm condition. There are two main wiring schemes class A and class B. The diagram below represents PUBLICATION OR REPORT NO . NBS TN 964 2. Gov't Accession No. 4. TITLE AND SUBTITLE 5. Publication Date Fire Alarm and Communication Systems April 1978 6.Table of Contents CONTENTS Chapter 1 Introduction to electronics Chapter 2 CARBON RESISTANCE Chapter 3 Report writing for Physics project for Class XII