Arduino based Fire Alarm – Circuit and Working Fig. 2 presents the circuit diagram for the fire alarm using a flame sensor and Arduino Nano. The system is powered by a step-down transformer (X1), a ...

The flame sensor detects the presence of fire or flame based on the Infrared (IR) wavelength emitted by the flame. It gives logic 1 as output if a flame is detected, otherwise, it gives logic 0 as ...

This simple fire alarm circuit uses a smoke sensor, a piezo buzzer for audible alerts, and an LED for visual signaling. When the smoke sensor detects the presence of smoke or gases, it sends a signal ...

To use the fire alarm system, follow these steps: Assemble the hardware components according to the circuit diagram provided. Upload the code to the Arduino board. Adjust the sensitivity of the alarm ...

This circuit diagram illustrates a fire and smoke detection system using an Arduino UNO R4 WiFi, MQ2 smoke sensor, and a flame sensor (fire sensor). The Arduino is the central controller that receives ...

Now as we know the main idea behind the working of each component. Let us assemble all the components and make a working circuit. Insert the Arduino Nano and MQ-2 smoke sensor in the breadboard. Power ...

Fig. 1: Author’s prototype Fig. 2: Block diagram of motion sensor alarm Circuit and working. The circuit diagram of the motion sensor alarm is shown in Fig. 3. It consists of a PIR motion sensor (MS1) ...