Description-

HC-SR04 Ultrasonic Sensor Module sends 8 square wave pulses (40Khz) and automatically detects whether it receives the returning signal. If it detects a signal,  a high-level pulse is sent on the echo pin. The length of this pulse is the time it took the signal from first triggering to the return echo.

Specifications-

• Operating voltage: 5 Volt DC

• Operating current: 15mA

• Measure angle: 15°

• Ranging distance: 2cm - 400cm

• Working frequency : 40Hz

• Trigger input signal : 10uS TTL pulse

• Echo output signal : Input TTL lever signal and the range in proportion

• Working voltage : 5 Volt DC

• Static current: Less than 2mA.

• Output signal: Electric frequency signal, high-level 5V, low-level 0V.

Applications / Suggested Uses-

• To avoid and detect obstacles with robots like biped robots, obstacle avoider robots, path finding robots, etc.

• To measure distance within the range - 2cm to 400cm

• To map the objects surrounding the sensor by rotating it

• Depth of wells, pits, etc. can be measured since the waves can penetrate through the water.