HC-SR04 HCSR04 a világ ultrahangos hullámérzékelő hatótávolság-mérő moduljához HC-SR04 HC SR04 HCSR04 távolságérzékelő
HC-SR04 HCSR04 to World Ultrasonic Wave Detector Ranging Module HC-SR04 HC SR04 HCSR04 Distance Sensor
Module main technical parameters:
1.Working Voltage: 5V(DC)
2.Static current: Less than 2mA.
3.Output signal: Electric frequency signal, high-level 5V, low-level 0V.
4.Sensor angle: Not more than 15 degrees.
5.Detection distance: 2cm-450cm.
6.High precision: Up to 0.3cm
7.Input trigger signal: 10us TTL impulse
8.Echo signal: output TTL PWL signal
Mode of connection:
1.VCC
2.trig(T)
3.echo(R)
4.GND
Use method:
Supply module with 5V, the output will be 5V while obstacle in range, or 0V if not. The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules.
Note: the module should be inserted in the circuit before been power, which avoids producing a high level of misoperation; if not, then power again.
Module Working Principle:
1.Adopt IO trigger through supplying at least 10us sequence of high-level signal.
2.The module automatically sends eight 40khz square waves and automatically detects whether receives the returning pulse signal.
3.If there are signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance =(high level time * sound velocity (340M/S) / 2.
Note: This module is not suitable to connect with electric power, if you need to connect this module with electronic power, then let the GND terminal of this module be connected first, otherwise, it will affect the normal work of the module.
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