Sensor

: The sensing element interacts with the environment (e.g., a thermistor changing resistance as it heats up).

: Detects motion by measuring changes in infrared radiation. Ideal for security lights or alarms. sensor

: Measures distance by bouncing sound waves off objects. Use these for robot obstacle avoidance or liquid level monitoring. 2. Environmental : The sensing element interacts with the environment (e

: The internal circuitry translates this change into a readable signal. : Measures distance by bouncing sound waves off objects

At its core, a sensor performs , which is the conversion of one form of energy (physical) into another (usually electrical).

Sensors act as the "eyes and ears" of electronic systems, converting physical phenomena—like heat, light, or movement—into measurable signals. This guide covers how they work, the major types available, and how to choose the right one for your project. 🛠️ How Sensors Work

: The data is sent to a controller (like an Arduino or Raspberry Pi) via an analog voltage or digital protocol. 📡 Common Types of Sensors 1. Motion and Proximity