Product Description:
The HC-SR04 Ultrasonic Distance Sensor is a reliable and affordable solution for measuring distances using ultrasonic sound waves. It is widely used in robotics, automation, obstacle detection, and DIY electronics projects. The module works by sending an ultrasonic pulse and measuring the time it takes to reflect back, calculating distance with high accuracy.
Features:
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Measuring Range: 2 cm – 400 cm
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Accuracy: ±3 mm
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Operating Voltage: 5V DC
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Working Current: <15 mA
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Trigger Input Signal: 10 μs TTL pulse
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Echo Output Signal: TTL pulse proportional to distance
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Frequency: 40 kHz ultrasonic wave
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Interface: 4-pin (VCC, Trig, Echo, GND)
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Dimensions: 45 mm × 20 mm × 15 mm
Applications:
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Robotics obstacle avoidance
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Parking assistance systems
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Distance measurement tools
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Level detection (liquid or solid)
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Smart home automation
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 3mm
Mode of connection: VCC / trig(T) / echo(R) / GND
Module Working Principle:
Adopt IO trigger through supplying at least 10us sequence of high level signal
The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal
If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving
Weight: 0.35 oz (10 g)
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