This project develops an automated alert system using an Arduino microcontroller, an LDR (Light Dependent Resistor), a buzzer, and an LED to monitor ambient light levels and provide timely ...

NodeMCU ESP8266 development board 2 LEDs (any color) 1 Buzzer (active or passive) 3 Resistors (220Ω to limit current to the LEDs) Breadboard and jumper wires for connections Pin Connections Component ...