Ultrasonic Sensor Ultrasonic waves are sound waves that exceed the limits of human hearing, with a vibration frequency above 20 kHz. When working, the ultrasonic sensor converts between voltage and ultrasonic waves. When the ultrasonic sensor emits ultrasonic waves, the probe converts voltage into ultrasonic waves and emits them. When receiving ultrasonic waves, the receiving … Read more
Arduino ULTRASONIC Sensor HC-SR04 Hack for Smart Fans!
Complete Video The ultrasonic sensor is an input module that provides excellent non-contact distance detection, stable performance, ease of use, a small blind spot, and high accuracy. The measuring distance ranges from 2 centimeters to 400 centimeters, and the best part is that it is very inexpensive. It is widely used in the maker community, … Read more
Example Effect Press the serial monitor, and you can see that the measured distance is 9.8cm-10.1cm with an error of about 0.2cm. HC-SR04 An ultrasonic sensor used for distance measurement, widely applied in robotics to avoid obstacles and measure distances. Its module uses Trig to trigger distance measurement, which emits 8 40kHz square waves and … Read more