DescriptionThe HC-SR04 is a professional and practical ultrasonic sensor module board, which is mainly made of durable hard PCB board and metal materials. Output voltage boosts along with the concentration of the measured distance increases.Module can send 8 pro 40 kz automatically, and will test if there is any signal returned. it is really a wonderful ultrasonic sensor module for choice.Features- Model: HC-SR04.- Color: as shown in the pictures.- Material: durable hard PCB board and metal.- Static current: Less than 2mA.- Power: DC 5.0V.- 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- Mode of connection:VCC, trig(T), echo(R), GND.- Module can send 8 pro 40 kz 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.
