Arduino Nano. HC-SR04 Ultrasonic Sensor. 5V Active Buzzer. Light-Emitting Diode. Current Limiting Resistor. 9V Battery. Slidder switch / on-off switch. Breadboard. Connecting wires. PVC Pipe. Up next, ...

PIN Code Access: Secure the system with a 6-digit PIN. LCD Display: 16x2 LCD for user interaction and status updates (e.g., "Enter Pin", "Alarm Active", "Motion Detected"). Keypad Input: A 4x4 matrix ...

Ultrasonic Sensor (HC-SR04): Measures distance in centimeters. Servo Motor: Rotates the sensor from 0° to 180° and back, allowing a scanning motion. LEDs and Buzzer: Provide visual and audible ...

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 ...

In this IoT-based smart bin project, an Arduino Uno R4 WiFi acts as the central control unit, interfacing with two ultrasonic sensors and a servo motor. The power bank provides 5V via the USB-C port, ...

The design of a “third eye for the blind,” which employs ultrasonic waves to detect surrounding obstructions and notify users with a buzzer sound or vibration, is made feasible by the collaboration of ...

[Klaus] wanted some sort of aid for parking his car, and after running across a $4 ultrasonic sensor, decided to build his own speaking distance sensor (.de, Google Translation). Inside [Klaus]&#82… ...

One way to accomplish this involves four HC-SR04 ultrasonic sensor units that transmit data through an Arduino into a Linux computer. The end result is a virtual touchscreen that can be made at home.