![]() HX711 has two analog input channels and we can get gain up to128 by programming these channels. HX711 Weighing Sensor Module has HX711 chip, which is a 24 high precision A/D converter ( Analog to digital converter). Now the electrical signals generated by the Load cell are in few millivolts, so they need to be further amplified by some amplifier and hence HX711 Weighing Sensor comes into the picture. Load cell comes in various ranges like 5kg, 10kg, 100kg and more, here we have used Load cell, which can weigh up to 40kg. ![]() A load cell usually consists of four strain gauges in a Wheatstone bridge configuration. And then strain gauge generates an electrical signal on deformation as its effective resistance changes on deformation. ![]() Load cells have a strain gauge, which deforms when pressure is applied to it. The magnitude of this electrical output is directly proportional to the force being applied. The load cell is a transducer that transforms force or pressure into electrical output. Load Cell and HX711 Weight Sensor Module: Required Components to build an Arduino Weight Scale: We have also used the same load cell in few other projects as, like the Portable Arduino Retail Weighing Machine, Raspberry pi Weighing scale, etc, you can also check them out if interested. This sensor is called as the load cell, so in this project, we will using this load cell as our Arduino weight sensor. The main component required to build this Arduino weighing scale is a sensor that can convert weight into an equivalent electrical signal. This limit can be further increased by using the Load cell of higher capacity. So here we are building the same Weighing machine by using Arduino and Load cells, having a capacity of measuring up to 40kg. We have seen weight machines at many shops, where the machine displays the weight just by placing an item on the weighing platform. Today we are going to build an Arduino wight machine, by interfacing Load Cell and HX711 Weight Sensor with Arduino.
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