DescriptionThis 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 module uses 24 high-precision A/D converter. This chip is designed for high-precision electronic scale and design, has two analog input channels, programmable gain of 128 integrated amplifier. The input circuit can be configured to provide a bridge voltage electrical bridge (such as pressure, load) sensor model is an ideal high-precision, low-cost sampling front-end module.Note : You’ll need load cell module to make this module operating normally.FeaturesTwo selectable differential input channelsOn-chip power supply regulator for load-cell and ADC analog power supplyOn-chip oscillator requiring no external component with optional external crystalOn-chip power-on-resetData Accuracy: 24 bit (24 bit analog-to-digital converter chip)Refresh Frequency : 10/80 HzOperation voltage : 4.8 ~ 5.5VOperation current : 1.6mAOperation temperature range : -20 to 85?Dimension : 36 x 21 x 4mm WiringLabelMeaningConnectionE Excitation Connect to RED wire of load cellE-Excitation –Connect to BLACK wire of load cellA-Input A-Connect to GREY wire of load cellA Input A Connect to GREEN wire of load cellB-Input B-Not usedB Input B Not usedGNDGroundConnect to GND of systemDTDataConnect to digital pinSCKSerial ClockConnect to digital pinVCCPower sourceConnect to 5V of system AttachmentsDatasheet – HX711Tutorial with code : Tutorial to Interface HX711 Balance Module With Load Cell – InstructablesTheory : Wheatstone bridge