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DescriptionThe 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. Need even more? Checkout the SparkFun Qwiic Scale. It has all the features of the HX711 but with additional library support， a true I2C interface， and no soldering required!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 GuideFeaturesOperation Voltage：2.7V--5VOperation Current：< 1.5mASelectable 10SPS or 80SPS output data rateSimultaneous 50 and 60Hz supply rejection

24ビットA/DコンバータHX711を搭載した計量用ロードセルアンプ。計量器用に設計された24ビットA/DコンバータHX711を搭載したM5Stack用の重さユニットです。ロードセルを用いることにより、M5Stackで重さを測定することができます。マルチプレクサで低ノイズプログラマブルゲインアンプ(PGA)へのチャネルAとチャネルBの差動入力を選択します。チャネルAは、5Vがアナログ電源ピンAVDDに接続されている場合、±20mVまたは±40mVのフルスケールに対応する128または64のゲインを設定できます。チャネルBは固定ゲインが32です。

DescriptionThe SparkFun OpenScale is a simple-to-use， open source solution for measuring weight and temperature. It has the ability to read multiple types of load cells and offers a simple-to-use serial menu to configure calibration value， sample rate， time stamp and units of precision.Simply attach a four-wire or five-wire load cell of any capacity， plug the OpenScale into a USB port， open a terminal window at 9，600bps， and you'll immediately see mass readings. The SparkFun OpenScale will enable you to turn a load cell or four load sensors in a Wheatstone bridge configuration into the DIY weigh scale for your application.The OpenScale was designed for projects and applications where the load was static(like the beehive in front of SparkFun HQ)or where constant readings are needed without user intervention(for example， on a conveyor belt system). A load cell with an equipped OpenScale can remain in place for months without needing user interaction!On board the SparkFun OpenScale is the ATmega328P microcontroller， for addressing your communications needs and transferring your data to a serial terminal or to a data logger such as the OpenLog， an FT231 with mini USB， for USB to serial connection； the HX711， a 24-bit ADC for weigh scales； and the TMP102， for recording the ambient temperature of your system. The OpenScale communicates at a TTL level of 9，600bps 8-N-1 by default and possesses a baud rate configurable from 1，200bps to 1，000，000bps.Get Started with the OpenScale GuideFeaturesOperating Voltage：5VOperating Ampage：80-100mAPower Cycling above 500msSelectable 10SPS or 80SPS Output Data RateLocal External Temperature SensorsFixed Adjustable Gain