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Specifications:
HC-SR04 Ultrasonic Sensor Parameters:
1. Use voltage: DC5V
2. Quiescent current: less than 2mA
3. level output: high 5V low 0V
5. Induction angle: no more than 15 degrees
6. Detection range: 0.78~196 in/ (2cm~500cm)
7. High accuracy: up to 0.12 in/(0.3 cm)
8. Ranging Distance : 2cm - 500 cm
9. Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND
(VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)
Module working principle:
Pull the Trig pin to high level for more than 10us impulse, the module start ranging.
The module automatically sends eight 40KHz square wave to detect whether a signal is returned.
Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.
So we can calculated the distance easily.The distance = ((Duration of high level)*(Sonic :340m/s))/2
Package Included:
12pcs HC-SR04 Ultrasonic Sensor.
Note:
The module should be inserted in the circuit before been powered to avoid
producing high level of misoperation; if producted, power it again.
The module is not suggested to connect directly to electric, if connected
electric, the GND terminal should be connected the module first, otherwise,it will affect the normal work of the module.
When tested objects, the range of area is not less than 0.5 square meters and the plane requests as smooth as possible, otherwise ,it will affect the results of measuring.
ADUA
2024-12-14 11:52:12
I test all if them with oscilloscope, luckily all of them are working, and the distance measured is quite accurate.
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