Sensor Ultrasonic SR04

HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor for Arduino

Specifications:

• 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 use IO port TRIG to trigger ranging. It needs 10 us high level signal at least Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned.
• If there is signal returned, output one high level signal via IO port ECHO. The duration of the high level signal is the time from transmitter to receiving with the ultrasonic.
• Testing distance =duration of high level*sound velocity(340m/s) / 2

Mode of connection:

• VCC supply 5V
• GND is ground wire.
• TRIG is trigger control signal input,
• ECHO is echo signal output.