Ultrasonic sensor HC-SR04
- Operating voltage 5 V DC
- Operating current 15mA
- The operating frequency of 40 kHz
- The maximum range of 5m
- Minimum range of 2cm
- The angle measuring 15 degrees
- Trigger - input pulse of 10 ms TTL level
- Echo output signal level TTL - PWM duration of 150 ms to infinity if there is no echo.
- Dimensions 45 * 20 * 15 mm ul>
Count | Price | |||
---|---|---|---|---|
From | 1 | шт | 115 | грн |
From | 5 | шт | 111 | грн |
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Ultrasonic sensor HC-SR04 - is a sensor that measures the distance to obstacles in the range from 2 to 450 cm. He is a board on which are placed the transmitter and receiver of ultrasound, as well as the control circuitry .
Sensor HC-SR04 has a small size and simple interface - two power leads, one input and one output:
- VCC: "+" power
- TRIG (T): The output of the input signal
- ECHO (R): The output of the output signal (signal length depends on the distance of the object to the sensor)
- GND: "-" Power
How it works Ultrasonic sensor HC-SR04 is based on the reflection of sound from an obstacle. Operation of the device can be divided into 4 stages:
- 1. Send a pulse duration of 10 ms to output Trig.
- 2. Inside rangefinder input pulse is converted to 8 pulses of 40 KHz and sent forward through the "T glazik"
- 3. Sent pulses reach the obstacle is recognized, accepted and then "R glazik." Obtain the output on pin Echo.
- 4. The received signal is converted to a simple formula in the distance to the object.
Ultrasonic sensor HC-SR04 can be used as a sensor in the presence of "smart house", as well as security systems.