An IR (infrared) sensor is an electronic device that emits or detects infrared radiation to sense surroundings.
The LDR (Light Dependent Resistor) sensor is an electronic component whose resistance value changes based on the intensity of the light it receives.
The MQ2 is a low-cost electrochemical gas sensor widely used in smoke detectors, gas leak alarms, and air quality monitors.
A flame sensor is a safety device designed to detect the presence of fire, flames, or UV/IR light.
The LED, also known as a Light Emitting Diode, isĀ a component that emits light.
A buzzer is an electronic component used to generate sound in Arduino projects, typically for alarms, notifications, or musical melodies.
A servo is a high-precision rotary actuator device used to accurately control angular position, speed, and acceleration.
Radio-frequency identificationĀ (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects.