Sensors

Sensors are fundamental components that detect physical quantities like temperature, humidity, motion, distance, gas concentration, and light intensity, providing data to electronic systems. In this category, you'll find a wide range of sensor types and specifications for applications from industrial automation to hobby projects, robotics to IoT.

Common Sensor Types and Applications

• Temperature & Humidity Sensors: Models like DHT22, SHT31 for environmental monitoring and climate control. Choose based on accuracy and response time.
• Distance Sensors: Ultrasonic (HC-SR04) and laser (VL53L0X) sensors for obstacle avoidance, level measurement, parking assist applications.
• Motion & Orientation Sensors: PIR motion detectors, accelerometers (MPU6050) and gyroscopes; ideal for security systems and drone stabilization.
• Gas & Air Quality: MQ series (MQ-2, MQ-135) for detecting flammable gas, smoke, carbon monoxide.
• Light & Color Sensors: LDR, BH1750 (lux meter), TCS34725 color sensor for lighting control and color recognition projects.

Key Considerations When Selecting a Sensor

Choosing the right sensor is critical to project success. First, define the physical quantity you need to measure and the required measurement range. The sensor's output type (analog voltage, digital I2C/SPI/UART) must be compatible with your microcontroller (Arduino, ESP32, STM32, etc.). Factors like supply voltage (typically 3.3V or 5V), power consumption, and operating temperature should not be overlooked, especially in battery-powered or harsh environment projects. Additionally, evaluate response time, accuracy (tolerance), and calibration requirements. For hobby use, breadboard-friendly modules are convenient, while industrial applications demand protection ratings (e.g., IP65) and noise immunity.