Security has always been a major concern for all of us and there are many Hi tech and IoT based security and surveillance system are ... at the door. The sensor module consists of ultrasonic ...

Then select “Circuits” on the left side ... you should connect the GND pin on the ultrasonic sensor to the negative channel on the breadboard. Next connect the Trig pin on the sensor to pin 2 on the ...

This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module ... and best understood by referring the wiring diagram. If everything goes right,you should ...

An Arduino project implementing a security alarm system featuring PIN code access via a 4x4 keypad, status updates on a 16x2 LCD, motion detection using an HC-SR04 ultrasonic sensor ... to include a ...

2: Block diagram of motion sensor alarm The circuit diagram of the motion sensor alarm is shown in Fig. 3. It consists of a PIR motion sensor (MS1), Arduino Nano (Board1), LM386 audio amp (IC1), and 8 ...

Finally, we incorporated the visual alert system for the Arduino ultrasonic ... is a very simple circuit. On the one hand, we will have all the alerts, acoustic and visual, and on the other hand the ...

The simplicity of this device can pave the way for creating life-saving systems. Fig. 1 shows the author’s prototype on a breadboard. Fig. 2 presents the circuit diagram for the fire alarm using a ...