Wave is one of the materials taught at the high school level (High School) and equivalent. Wave lessons can be developed through technology, unfortunately very difficult to implement especially in small towns and rural areas. This study aims to design an Arduino tool using an ultrasonic sensor as a radar in wave material. The research uses four stages, namely: hardware design, software design, teaching aids making and teaching aids testing. The results of the Arduino design based on ultrasonic sensors in the processing software display a detectable distance, which is a maximum of 40 cm equipped with an angle.
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