Ultrasonic Wave Ranging Module Detector Distance Sensor HC-SR04

Descriptions:

- power supply :5V DC
- quiescent current : <2mA
- effectual angle: <15
- ranging distance : 2cm 450 cm
- resolution : 3mm

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 being powered up, which avoid producing high level of non operation ;if not, then power again.
his 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 to be connected first,otherwise, it will affect the normal work of the module!!!

Module Working Principle:
1.Adopt IO trigger through supplying at least 10us sequence of high level signal.
2.The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal.
3.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. Test distance = (high level time * sound velocity (340M/S) / 2.

This item is tested and working by the manufacturer and sealed, under no circumstances will we replace / exchange or give anywarranteeon this item once the seal has been broken, and will then assume the item as used -if you do not agree with this please do not order - we also cannot offer any support via email or phone, as instructions are supplied on how to use and connect up the device.