2pcs HC-SR04 Distance Measuring Transducer Sensor Ultrasonic Module Tester Detector Ranging Distance Sensor
Sensor type: ultrasonic ranging module
Impedance: 1 (Ohms)
Size: 1 mm/0.04"
Terminal type: ultrasonic ranging module
Output type: ultrasonic ranging module
Net weight: 3.6 g
Main technical parameters:
Service voltage: DC5V
Quiescent current: less than 2mA
Level output: high 5V
Level output: bottom 0V
Induction angle: ≤15 degrees.
Detection distance: 2cm-450cm/0.79-177.17"
High accuracy: up to 0.3cm/0.12"
On board wiring mode, VCC, trig (control end), echo (receiving end), out (empty foot), GND
Module work principle:
The IO triggers the ranging to give at least 10us high level signals.
The module automatically sends 8pcs 40KHz square wave to automatically detect whether there is a signal return.
When the signal returns, a high level is output by IO, and the duration of the high level is the time from transmitting to returning. The test distance is equal to (high level time * sound speed (340M/S)/2.
This module can provide a full range of procedures: C51, PIC18F877, ultrasonic LCD1602 display, ultrasonic LCD12864 display, digital tube.
TRIP pin is an internal pull-up resistance of 10K. It uses IO port of single chip computer to pull down TRIP pin, and then gives a pulse signal of more than 10us.
The OUT foot module is the switch output pin for the anti-theft module, and the ranging module does not use this foot.
Modules should be plugged into the circuit board before power-on, to avoid high-level misoperation, if it occurs, re-power can be resolved.
This module can provide distance measurement program: C51, PIC18F877, single chip microcomputer, three kinds of MCU test reference.
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow slight measuring deviation due to manual measurement.
2 x Ultrasonic Modules