Circuit Diagram and Explanation: Circuit connections for this Ultrasonic Alarm are very simple. Trigger pin of ultrasonic sensor is connected to pin no. 12 of Arduino and Echo pin of sensor is ...

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 ...

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 ...

Working of Dog Barking Security using Arduino. Make the connections as per the circuit diagram and upload the code to Arduino Nano. When powered, the PIR sensor detects the IR rays emitted from the ...

A burglar alarm or an intruder alarm is basically an electronic device that sounds an alarm when it detects an intruder in the home. ... Security Alarm. This article is about making an intruder alarm ...

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) ...