Description:

This module uses 24 high precision A/D converter chip hx711. It is a specially designed for the high precision electronic scale designwith two analog input channelthe internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressureweighing sensor mode)is of high precisionlow cost is an ideal sampling front-end module.

شرح :

فيديو تعليمي لكيفية استخدام القطعة بالتفصيل 

Features:

• Two selectable differential input channels
• On-chip active low noise PGA with selectable gain of 3264 and 128
• On-chip power supply regulator for load-cell and ADC analog power supply
• On-chip oscillator requiring no external component with optional external crystal
• On-chip power-on-reset
• Simple digital control and serial interface: pin-driven controlsno programming needed
• Selectable 10SPS or 80SPS output data rate
• Simultaneous 50 and 60Hz supply rejection
• Current consumption including on-chip analog power supply regulator: normal operation < 1.5mApower down < 1uA
• Operation supply voltage range: 2.6 ~ 5.5V
• Operating Temperature Range:-20 degree ~ +85 degree

Documents:

• Datasheet

• Library 
  

Mikroelectron Code:

#include "HX711.h"

// HX711.DOUT	- pin #A1
// HX711.PD_SCK	- pin #A0

HX711 scale(A1, A0);

float read_ADC;
float read_load;
float read_average;

void setup() {
  Serial.begin(38400);
  scale.set_scale(400.f); // this value is obtained by calibrating the scale with known weights; see the README for details
  scale.tare();				        // reset the scale to 0

  Serial.print("read: \t\t");
  Serial.println(scale.read());  // print a raw reading from the ADC

  Serial.print("read average: \t\t");
  Serial.println(scale.read_average(20));  // print the average of 20 readings from the ADC

  Serial.print("get units: \t\t");
  Serial.println(scale.get_units(5), 1);        // print the average of 5 readings from the ADC minus tare weight, divided
  // by the SCALE parameter set with set_scale

  Serial.println("Readings:");
}

void loop() {
  read_ADC   =   scale.read();
  Serial.print("read: \t");
  Serial.println(read_ADC);                 // print a raw reading from the ADC

  read_load   =    scale.get_units();

  Serial.print("One reading:\t");
  Serial.print(read_load, 1);
  Serial.println("  Gram");

  read_average   =    scale.get_units(10);
  Serial.print("Average:\t");
  Serial.print(read_average, 1); // print the average of 10 readings from the ADC minus tare weight, divided
  // by the SCALE parameter set with set_scale
  Serial.println("  Gram");

  delay(1000);

}