Arduino ultrasonic sensor

• Arduino ultrasonic sensor

  Features
  
  US-100 Ultrasonic Ranging Module 2CM ~ 4.5M of non-contact distance measurement function, with
  
  2.4 to 4.5 wide voltage input range, the static function GPIO, serial variety of communication methods,
  
  Within the band Watchdog, stable and reliable.

  specials :
  
  a. voltage: DC5V
  b quiescent current: less than 2mA
  c level output: 5V
  d level of output: the end of 0V
  e. Induction angle: greater than 15 degrees
  f detection distance: 2cm-450cm
  g precision: up to 1mm

  Connection mode:
  From left to right number VCC, trig 's (control side), echo (receiving end), GND (ground)

  How to use:
  
  High above Port a 10US a control, wait for the high output at the receiving port. An output can be opened to the timer, you can read the timer value when this port becomes low, this the ranging time before they figure out the distance. such a continuous cycle of measurement, you move to the measured value can be achieved

  The module works:
  
  (1) IO trigger ranging to at least 10us high signal;
  
  (2) module automatically sends eight 40kHz square wave, automatically detect whether a signal return;
  
  (3) a signal to return to a high IO output, high duration of the ultrasonic time from launch to return. Measure
  
  Test distance = (high time * speed of sound (340M / S)) / 2;

  This module provides a full range of ranging process: C51, PIC18F877 ultrasonic LCD1602,
  
  The ultrasonic LCD12864 display, digital display, serial display, ranging reference program.

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