The set-up process is very simple, and best understood by referring the wiring diagram. If everything goes right,you should see the burning eye of the red LED when there is no object in the safe-zone ...

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 ...

It utilizes an ultrasonic sensor to measure distance and triggers an alarm when an object or person comes within a predefined proximity range (<25 cm).The Ultrasonic-Based Alarm System provides a ...

11 - Arduino Nano Buzzer simulation. 12 - Arduino Nano Motor Driving with BD139 Transistor. 13 - Transistor Driver Circuit Using 547 and BD139. 14 - Read switch and Buzzer simulation with and Without ...

1 Arduino Ultrasonic Sensor (HC-SR04) 1 buzzer; Ultrasonic sensor, mounting circuit; It is a very simple circuit. On the one hand, we will have all the alerts, acoustic and visual, and on the other ...

Fig. 2: Circuit diagram of social distancing alarm. HC-SR04 ultrasonic sensor utilises sonar to determine distance from an object (or humans as in this case). It offers excellent non-contact range ...