Question

Synopsis for fire alarm project (bulb filament used as fire sensor)

Answer 1

Answer:

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Explanation:

In this fire alarm circuit project, a thermistor works as the heat sensor. When temperature increases, its resistance decreases, and vice versa. At normal temperature, the resistance of the thermistor (TH1) is approximately 10 kilo-ohms, which reduces to a few ohms as the temperature ncreases beyond 100°C.