Ultrasonic Sensors
Ultrasonic sensors are electronic devices that use sound waves at frequencies above the human hearing range (typically 20 kHz to several hundred kHz) to measure distance or detect objects. They work by emitting ultrasonic pulses and measuring the time it takes for the echoes to return after bouncing off surfaces. These sensors are widely used in robotics, automation, and IoT applications for non-contact sensing.
Developers should learn about ultrasonic sensors when building projects involving obstacle avoidance, proximity detection, or distance measurement, such as in autonomous robots, smart parking systems, or industrial automation. They are particularly useful in environments where optical sensors might fail due to dust, smoke, or lighting conditions, offering a reliable and cost-effective solution for real-time spatial awareness.