Electrical Technology of World - Fire Alarm Project using Thermistor and IC 555 Fire alarms are prime necessities in modern buildings and architectures, especially in banks, data centers and gas stations. They
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![Circuit diagram of a 555 timer-based alarm circuit [18] | Download Scientific Diagram](https://www.researchgate.net/publication/338710962/figure/fig3/AS:855654524780554@1581015344371/Circuit-diagram-of-a-555-timer-based-alarm-circuit-18.png "Circuit diagram of a 555 timer-based alarm circuit [18] | Download Scientific Diagram")
Circuit diagram of a 555 timer-based alarm circuit [18] | Download Scientific Diagram
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