- The HC-SR04 ultrasonic sensor can send eight 40 kHz and detect whether there is any pulse signal back.If it back, a high level signal will be outputted by IO, and the duration of the signal is the time from sending ultrasonic to returning
- HC-SR04 Test Distance : high level time velocity of sound (340M/S) /2
- HC-SR04 Power Supply : 5V DC; Quiescent Current : <2mA,; Effectual Angle: <15° ; Detection Distance : 2cm~500 cm; Resolution : 0.3 cm
- Equipped with anti-reverse pin socket – making the wiring much tighter and convenient; 4-pin anti-reverse cable also included.
- Uses the MCU STC15W104 which has a built-in clock, no need of external crystal oscillator.
Power Supply :5V DC
Quiescent Current : <2mA
Effectual Angle: <15°
Ranging Distance : 2cm - 500 cm
Resolution : 0.3 cm
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.)
Attention:
The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if produced, 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.
