Projects using this component
Night Light with Ldr
LDR based night light project that automatically turns on the LED when the environment gets dark. Teaches automatic control logic with analog threshold comparison.
Laser Warning System
Security project that detects when the laser beam is interrupted via LDR and warns with buzzer and LED. Teaches the logic of light interruption detection with laser-LDR pair.
Laser Security System
Advanced security system that activates the alarm when the laser beam is interrupted and can be reset by push button or IR control. Teaches multiple input source and state management.
Reading Light Intensity with Ldr
Project that measures ambient light intensity with LDR sensor and displays it on Serial Monitor. Teaches the basics of analog sensor reading and serial communication.
ESP32 Night Light with LDR
Night light where the LED automatically turns on in the dark and off in the light. The D0 (digital out) pin of the LDR Sensor Module is used - the dark threshold is set with the small potentiometer on the module, the module itself generates the HIGH/LOW output. ESP32 just reads this signal with digitalRead(), the code is very simple.
Reading Light Intensity with the ESP32 LDR Module
Real-time monitoring of the light value measured by the LDR module in the Serial Monitor + approximate lux value. Teaches the module’s calibration logic. It is ideal to complete this before Project 10, as it is used to determine the threshold value.
ESP32 Smart Lighting (PIR + LDR + Relay + OLED)
Turn your hallway, bathroom, or pantry into smart lighting with ESP32! Using a PIR motion sensor, LDR light sensor, and a relay module, we build the classic "light turns on when motion is detected in the dark" scenario — if the environment is already bright, motion does NOT trigger the light, saving energy during the day. The light stays on for 30 seconds; if motion continues, the timer resets and the light stays on longer. The SSD1306 OLED shows large-font status (ON / DAYTIME / WAITING), a cou