Arduino Lecture 8: Sensors

Arduino Lecture 8: SensorsArduino Lecture 8: Sensors01Definition of SensorA sensor (transducer/sensor): is a device that can sensethe information being measuredand can convert the sensed information intoelectrical signalsor other required forms of information output, to meet the requirements for information transmission, processing, storage, display, recording, and control.It is a detection device.

The existence and development of sensors have given objects tactile, taste, and olfactory senses, bringing them to life. Sensors are extensions of human senses; they are characterized by miniaturization, digitization, intelligence, multifunctionality, systematization, and networking. They are the primary link for achievingautomatic detectionand automatic control.

02Components of a Sensor

‌‌Sensors generally consist ofsensitive elements, conversion elements, conversion circuits, andauxiliary power supplies—four main components.

Arduino Lecture 8: Sensors03Functions of Sensors

To obtain information from the external environment, it is necessary to rely onsensing organs. However, relying solely on human sensory organs is far from sufficient in studyingnatural phenomenaand the laws governing them, as well asproduction activities. To adapt to this situation, sensors are required. Therefore, it can be said that sensors are extensions of human senses, also known as electrical senses.

04Common Sensors Used with ArduinoArduino Lecture 8: Sensors

1. Environmental Monitoring Sensors:Temperature and Humidity Sensor (DHT11), Digital Temperature Sensor (DS18B20),Gas Sensor (MQ-2),Barometric Pressure Sensor (BMP180),Temperature and Humidity Barometric Pressure Sensor (BME280),Light Sensor,Light Intensity Sensor (TSL2561), etc.;

2. Motion and Position Detection Sensors:Ultrasonic Sensor (HC-SR04),Accelerometer (MPU6050),Magnetometer Sensor (HMC5883L), etc.;

3. Optical and Image Sensors:Color Recognition (TCS3200),Image Acquisition,Infrared Obstacle Avoidance,Infrared Thermometer, etc.;

4. Touch and Interaction Sensors:Multi-Touch,Pressure Sensors,Sound Sensors,Vibration Sensors, etc.;

5. Biological Monitoring Sensors:Heart Rate and Blood Oxygen,Electromyography Sensors, etc.;

6. Others.

05Reading Sensor Data

The usage of sensors is generally similar,using the digitalRead(pin) or analogRead(pin) functionsto obtain values.

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