Sensors
Sensors convert the physical world — temperature, light, motion, pressure, humidity and more — into electronic signals. They are the sensory organs of IoT and automation designs.
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Temperature (NTC, DS18B20), acceleration/gyroscope (IMU), distance (ultrasonic, ToF), light (LDR, photodiode) and gas sensors are the main types. Measurement range, accuracy, interface (analog, I2C, SPI) and supply voltage matter when choosing one. Smart home, wearables, industrial monitoring and robotics are the most common applications.
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Frequently asked questions
What is the difference between analog and digital sensors?+
An analog sensor outputs a continuously varying voltage/resistance and needs an ADC to read; a digital sensor delivers the measurement as ready digital data over an interface like I2C/SPI.
How do I choose the right sensor?+
The quantity to measure, the required range and accuracy, an interface compatible with your microcontroller (analog/I2C/SPI) and supply voltage are decisive. Calibration and response time also matter.
What is an IMU sensor?+
An IMU (Inertial Measurement Unit) combines an accelerometer and gyroscope; it measures a device's orientation and motion. It is widely used in drones, phones and wearables.