The HC-SR04 is a popular ultrasonic sensor used to measure distances accurately using sound waves. It operates by sending out a high-frequency ultrasonic pulse and measuring the time it takes for the echo to bounce back from an object. This time is then converted into distance using simple calculations.
Key Features:
Operating Voltage: 5V DC
Measuring Range: 2 cm to 400 cm (0.02 m to 4 m)
Accuracy: ±3 mm
Operating Frequency: 40 kHz
Trigger Input Signal: 10µs TTL pulse
Echo Output Signal: TTL level signal proportional to distance
Interface: 4 Pins – VCC, Trig, Echo, GND
Dimensions: Approx. 45mm x 20mm x 15mm
How It Works:
Trigger: A 10µs pulse is sent to the Trig pin.
Ultrasonic Burst: The sensor emits 8 ultrasonic waves at 40 kHz.
Echo Detection: The Echo pin stays HIGH until the waves return after hitting an object.
Distance Calculation: The duration of the HIGH signal is used to calculate the distance:
Applications:
Obstacle avoidance robots
Distance measurement systems
Level detection (water tank, bins)
Automated parking systems
Security systems
HC SR04 Ultrasonic sensor
RETURN POLICIES
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