MIOYOOW HC-SR04 Ultrasonic Ranging Alarm Soldering Kit with LED Lights

【Ultrasonic Distance Sensor DIY Kit】: Build your own ultrasonic distance measurer with this hands-on soldering kit. Measures distances from 0 to 270cm. Real-time measurements are displayed on the digital screen, LED indicators light up according to the measured range, helping you quickly visualize distance changes during operation.
【Adjustable Distance Alarm Function】: Customize your obstacle detection distance using the two onboard buttons to increase or decrease the alarm threshold. When an object moves within the preset range, the buzzer alerts you immediately—great for learning obstacle detection principles.This DIY soldering kit is not only a great way to learn electronics but also a practical tool for everyday use.
【Operational Principle】: The ultrasonic ranging system is based on the reflection of acoustic waves when encountering obstacles. The HC-SR04 ultrasonic sensor measures the time difference between transmitted and received ultrasonic waves to calculate the distance between the obstacle and the sensor.