[따라하기] 아두이노 기초 – 초음파센서 사용하기 by ODIY 한국과학창의재단 Ardunio – Ultrasound sensor with LED #define TRIG 2 // Sending out ultrasound #define ECHO 3 // Receiving ultrasound #define LED 9 // Controlling LED void setup() { // put your setup code here, to run once: pinMode(TRIG, OUTPUT);…