We are interfacing 40Kg load cell to the arduino using HX711 Load cell amplifier module. Did you make this project? For this program to run you need HX711 Library Download from here hx711-master. Arduino Code for Load Cell // Load cells are linear. We chose the red and black... 2. Red -> E+ DT -> Digital 3 Please help! if(millis() > time + timeBetweenReadings){     float load = analogToLoad(analogValueAverage);     Serial.print("analogValue: ");Serial.println(analogValueAverage);     Serial.print("             load: ");Serial.println(load,5);     time = millis();   } } float analogToLoad(float analogval){   // using a custom map-function, because the standard arduino map function only uses int   float load = mapfloat(analogval, analogvalA, analogvalB, loadA, loadB);   return load; } float mapfloat(float x, float in_min, float in_max, float out_min, float out_max) {   return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; }, You'll now see data displayed in the Serial monitor, but it won't make much sense until you calibrate the scale. Then this amplified value is fed to the Arduino where the output of HX711 is converted into the weight values in grams. First load calibration sketch then using serial terminal. Connect the red wire to the E+ and the black wire to the E- output of the HX711 module. please help me regarding to this. will not work with the hx-711. It's important to select the correct load cell for the correct application. Also, please note that i am using an Arduino Uno and HX711, How to calculate “float calibration_factor”, 1. Channel B has a fixed gain of 32. Load cell also have precision type. Attach metal strip on the Load cell using bolts. Once you upload the calibration code, open serial monitor and adjust your scale factor with known weight until you see the correct readings. how can i get the results to be read in grams or ounces? analogValue: 0.00 load: -6.40610, Reply void loop() { using GML692 Sensor example code, circuit, pinout library GAIN = 1; void HX711::set_gain(byte gain) { The output result is displayed on the 16*2 LCD. However, increased accuracy is needed with shop-counter scales or scales used in filling machines. Accuracy class C3 load cells are widely used in machine construction as well. Well, i tried these codes with 30kg load cell, it’s not showing any deflections from 0 kg as such. GAIN = 3; VCC -> 5V It will make my day. How can i interface a 3 wire Load cell (50kg) Regards See the wiring diagram for how to connect the load cells, HX711, and Arduino. Where do i see the output values after running the calibration and weighing codes. The output of the load cell is too minute for an Arduino to read on it’s own, so I picked up a <$5 amplifier module online to convert the reading into a signal the Arduino can read. A specific accuracy grade specifies an error envelope for certain parameters, such as linearity, hysteresis, temperature effects, creep, etc. In this tutorial, I will explain how to build a weighing scale with an Arduino, an HX711, and a load cell. hey, i have the very same issue with my 50kg load cell (there is only 3 wires : black red and white ). “Thanks for this Project. Channel A differential input is designed to interface directly with a bridge sensor’s differential output. how do we code to store the value of weight we sensed using load cell and depending on that to send a message alert using gsm? In this example A = 10 kg. I have 4 three wired load cells. i first tried to check if the load cell work well and i have the good resistance values so the problem don’t come from that. Data Sheet: http://www.ti.com/lit/ds/symlink/ina125.pdf, // Arduino as load cell amplifier // by Christian Liljedahl // christian.liljedahl.dk // Load cells are linear. First we are going to mount the load cell. With the HX711 and load cell together with the Arduino Nano, you can create a … The HX711 Dual-Channel 24 Bit Precision A/D weight Pressure Sensor Load Cell Amplifier and ADC Module is a small breakout board for the HX711 IC that allows you to easily read load cells to measure weight. case 128: // channel A, gain factor 128 seems i could use B+ and B- for data and clock and share ground and power.. however when i do this i get no readings from either LC. Question here the value is printing continuously but i need that it need to print only if the value is either less or greater if the value is same it not to be printed. it's in the directions, btu I have found the ina to be troublesome unless wired very carefully. It can be programmed with a HX711 is a precision 24-bit analogto-digital converter (ADC) designed for weigh scales and industrial control applications to interface directly with a bridge sensor. No matter Load cell is connected or not HX711 outputs ramdom values. i got random data sir, how to calibrate hx711 with 5kg loadcell? Most any pin on the Arduino Uno will be compatible with DOUT/CLK. This assembly can be used with Arduino UNO, Mega R3 or similar boards.