HC-SR04 Ultrasonic Distance Meter

Easy-to-use ultrasonic distance sensor with measuring range of 2 cm - 3 m. The sensor is equipped with LED indicator that shows the current measurement status. Only one I/O port is needed to communicate with the sensor, communication is via a simple pulse in / pulse out signal. The 3-pin connector allows you to connect the sensor to MCU or connect it using a standard jumper wire. The operation of the sensor is very simple, an ultrasonic wave is emitted by the transmitter, then returns to the sensor after reflection from the obstacle, the sensor measures time between sending and receiving the wave to calculate the distance from the obstacle on this basis.

Technical data:

- Measuring range: 2 cm - 3 m

- Supply voltage: 5V +/- 10% (Absolute minimum: 4.5V maximum: 6V)

- Typical current consumption: 30 mA

- Maximum current consumption: 35 mA

- 3-pin interface

- Communication: pulse in / pulse out

- LED indicator showing the measurement status

- Measurement trigger: positive TTL pulse, 2 minimum, 5 typical

- Feedback signal: positive TTL pulse, 115 to 18.5ms

- Echo Hold-off: 750 from fall of trigger pulse

- Frequency: 40 kHz for 200

- Dimensions: 22 x 46 x 16 mm