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SparkFun稱重傳感器放大器 - HX711

原名
SparkFun Load Cell Amplifier - HX711

貨號
SEN-13879

特價
328

資料來源:https://www.sparkfun.com/products/13879

The SparkFun Load Cell Amplifier is a small breakout board for the HX711 IC that allows you to easily read load cells to measure weight. By connecting the amplifier to your microcontroller you will be able to read the changes in the resistance of the load cell, and with some calibration you’ll be able to get very accurate weight measurements. This can be handy for creating your own industrial scale, process control or simple presence detection.

This version of the SparkFun Load Cell Amplifier features a few changes that you specifically asked for! We have separated the analog and digital supply, as well as added a 3.3uH inductor and a 0.1uF filter capacitor for digital supply.

The HX711 uses a two-wire interface (Clock and Data) for communication. Any microcontroller’s GPIO pins should work, and numerous libraries have been written, making it easy to read data from the HX711. Check the hookup guide below for more information.

Load cells use a four-wire Wheatstone bridge configuration to connect to the HX711. These are commonly colored RED, BLK, WHT, GRN and YLW. Each color corresponds to the conventional color coding of load cells:

  • Red (Excitation+ or VCC)
  • Black (Excitation- or GND)
  • White (Amplifier+, Signal+ or Output+)
  • Green (A-, S- or O-)
  • Yellow (Shield)

The YLW pin acts as an optional input that is not hooked up to the strain gauge but is utilized to ground and shield against outside EMI (electromagnetic interference). Please keep in mind that some load cells might have slight variations in color coding.

Note: Special thanks to Bodge for supplying the Library for the HX711!

Get Started with the HX711 Load Cell Amplifier Guide

Features:

  • Operation Voltage: 2.7V–5V
  • Operation Current: < 1.5mA
  • Selectable 10SPS or 80SPS output data rate
  • Simultaneous 50 and 60Hz supply rejection

Documents:

Videos

在SparkFun力傳感器放大器是為HX711 IC的小分線板,可以讓你輕鬆地閱讀稱重傳感器測量重量。通過連接放大器微控制器,你將能夠讀取稱重傳感器的電阻的變化,並與一些校準你就可以得到非常準確的重量測量。這是很方便的創建自己的產業規模,工藝控制或簡單的存在檢測。

這在SparkFun力傳感器放大器版本的功能,你專門問了一些變化!我們已分離出的模擬和數字電源,以及添加器3.3uH電感和一個0.1uF的濾波電容數字電源。

的HX711用於通信一個兩線接口(時鐘和數據)。任何微控制器的GPIO引腳應該工作,以及眾多的圖書館已被寫入,因此很容易從HX711讀取數據。檢查下面的聯播指南以獲取更多信息。

負載細胞利用一個四線惠斯通電橋配置連接到HX711。這些通常顏色為紅色,BLK,WHT,GRN和YLW。每種顏色對應於稱重傳感器的常規彩色編碼:

  • 紅(激勵+或VCC)
  • 黑色(Excitation-或GND)
  • 白色(放大器+,+信號或輸出+)
  • 綠色(A-,S-或O-)
  • 黃色(盾)

該YLW引腳作為未掛接到應變計,但利用地面和盾防外界電磁干擾(EMI)的可選輸入。請記住,一些負載細胞可能有顏色編碼的細微變化。

注:特別感謝Bodge用於為HX711供應庫!

入門與HX711稱重傳感器放大器指南

特徵:

  • 工作電壓:2.7V-5V
  • 工作電流:<1.5毫安
  • 可選10SPS或80SPS輸出數據速率
  • 同時50和60Hz的電源抑制

文件:

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