#define TRIG_PIN A0 //For Ultrasonic sensors if you change the place of the pin u have to change them as well #define ECHO_PIN A1 //For Ultrasonic sensors if you change the place of the pin u have to ...

Smart Blind Stick using Arduino Circuit Diagram. The below circuit diagram shows the complete hardware wiring setup of the Arduino-based Smart Walking Stick for the Blind people, detailing how the ...

Ultrasonic Module with Arduino Connection Diagram. The Following connections are made between Arduino UNO and the Sensor: Arduino Code. As discussed in the working section, we need to send 10uS pulses ...

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 ...

code: // C++ code // include the library code: #include // initialize the library with the numbers of the interface pins LiquidCrystal lcd(12, 11, 5, 4, 3, 2); int ultrasonic = 0; long ...

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.