[Arduino] 초음파 거리 측정기, HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor
Features: 100% Brand New and High Quality Working Voltage : 5V(DC) Static current: Less than 2mA. Output signal: Electric frequency signal, high level 5V, low level 0V. Sensor angle: Not more than 15 degrees. Detection distance: 2cm-450cm. High precision: Up to 0.3cm Input trigger signal: 10us TTL impulse Echo signal : output TTL PWL signal… Read More »