HC-SR04 HCSR04 Sensor Ultrasonic Pengukur Jarak Arduino Raspberry Pi

ULTRASONIC SENSOR HC-SR04 Product Description Module main technical parameters: 1.Working Voltage : 5V(DC) current: Less than 2mA. signal: Electric frequency signal, high level 5V, low level 0V. angle: Not more than 15 degrees. 5.Detection distance: 2cm-450cm. precision: Up to 0.3cm trigger signal: 10us TTL impulse signal : output TTL PWL signal Mode of connection: (T) (R) Module Working Principle: IO trigger through supplying at least 10us sequence of high level signal. module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal. there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance = (high level time * sound velocity (340M/S) / 2.