RC522 RFID Reader
13.56 MHz RFID reader/writer module for cards and key fobs.
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HC-SR04 Ultrasonic Sensor
Ultrasonic distance sensor for object detection and ranging (approximately 2–400 cm).
DHT11 Temperature & Humidity Sensor
Basic digital sensor for measuring ambient temperature and relative humidity.
Water Level Sensor
Water detection and liquid-level sensing module for Arduino and ESP32 projects.
Soil Moisture Sensor
Soil moisture sensor module for plant monitoring and automatic irrigation projects.
PIR HC-SR501 Motion Sensor
Passive infrared motion sensor for detecting movement in security, lighting and automation projects.
LDR Light Sensor Module
Light-dependent resistor module for detecting ambient light intensity.
MQ-2 Gas Sensor
Gas and smoke sensor module for experiments with LPG, propane, methane and smoke detection. Requires warm-up and calibration; not a life-safety alarm.
5V Single-Channel Relay Module
5V coil, single-channel relay module for switching compatible AC or DC loads. Check load voltage and current ratings before use.
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