This project demonstrates how to build an Intruder Alarm System using an HC-SR501 PIR sensor, Arduino Uno, a 5V relay, and a buzzer. The system detects motion using the PIR sensor and triggers the ...

The circuit is infact a dark activated switch measures the ambient light level and will enable the system only when ambient light level is below a threshold value. Here an LDR (Light Dependent ...

This code controls a burglar detection alarm system that uses a PIR sensor to detect motion. When motion is detected, an LED lights up, and a piezo buzzer sounds an alert. The system helps in ...

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 ...

When the PIR sensor will detect an intruder, it will send a signal to Arduino and the Arduino will sound an alarm. This circuit is very simple and will be designed on a Veroboard. This Veroboard will ...

Code explanation of the Arduino PIR Interfacing. The code explanation of the code is as follows. The complete code can be found at the absolute bottom of the blog. const int pirPin = 5; This line ...

This PIR sensor based security system is designed using UM3561 IC. The proposed system mainly consists of PIR sensor, UM3561 IC, Speaker, transistors. The UM3516 IC is a Siren generator IC. Circuit ...

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) ...

Build a Simple, Photo Snapping Alarm System with an Arduino. Thorin Klosowski. December 8, 2015 Alarm systems are complicated affairs.