How accurate is HX711?

The HX711 amplifier sensor includes a HX711 chip with analog-to-digital conversion capability in 24-bit accuracy. The HX711 module amplifies the low-voltage output of the load cell and sends it to the Arduino so that the Arduino eventually calculate weight from this data.

How does a load cell measure weight?

Two of the load cells are positioned in tension mode and the other two are positioned in compression mode. When you step onto the scale, the microcontroller takes their outputs and converts them to an aggregate weight value in the selected unit of measurement, and displays that number on a gauge.

Is HX711 an amplifier?

HX711 module is a Load Cell Amplifier breakout board for the HX711 IC that allows you to easily read load cells to measure weight. It is a specially designed for the high precision electronic scale design, with two analog input channel, the internal integration of 128 times the programmable gain amplifier.

How do you convert a load cell reading to total weight?

How to Convert a Load Cell Reading Into Total Weight

1. Obtain the individual load cell’s characteristics.
2. Multiply the load cell’s reading in millivolts by the full scale weight of the load cell.
3. Divide the product from Step 2, 2.7 volt-pounds, by sensitivity in millivolts/volt times the excitation voltage.

Can I use two load cells?

To connect multiple load cells in parallel, use a watertight junction box, with a suitable terminal strip, or a multi-channel transmitter in the box. The cables in and out of the box or multi-channel transmitter require the installation of cable clamps.

How do I connect my Arduino to HX711?

More videos on YouTube

1. Step 1: Components.
2. Step 2: Connect the Load Cell to the HX711 Module.
3. Step 3: HX711 Module to the Arduino board.
4. Step 4: Start Visuino and select the Arduino Board type.
5. Step 5: In Visuino, add and connect HX711 Weight Scale component.
6. Step 6: Generate, Compile, and Upload the Arduino code.

What is calibration factor in load cell?

A calibration factor is determined based on the use of a master load cell, or combination of master load cells, meeting the requirements of ASTM E74. The calibration process applies load using three cycles. The first cycle is a relatively rapid cycle from 0 to 100 percent of the calibration.

How to use the hx711 module in Arduino?

The HX711 module amplifies the low-voltage output of the load cell and sends it to the Arduino so that the Arduino eventually calculate weight from this data. Be careful about the side of the load cell when you’re putting a weigh on it. Usually, there is an arrow on the module that shows the force direction.

How do I use the hx711 with the bar load cell?

To use the HX711 with the bar load cell, we just connect the output wires White and Green to the A+ and A- pins. Then, we supply power or excitation to the bridge by connecting the Red and Black wires to the E+ and E- pins respectively: Notice that there is a B+ and B- pins on the HX711. This is for connecting a second Wheatstone bridge to it.

What is the hx711 weight sensor module?

Load Cell and HX711 Weight Sensor Module: The load cell is a transducer that transforms force or pressure into electrical output. The magnitude of this electrical output is directly proportional to the force being applied. Load cells have a strain gauge, which deforms when pressure is applied to it.

What is a load cell in Arduino?

A load cell or a Strain Gauge is basically a Transducer which generates an electrical signal whose magnitude is proportional to the force applied. The various load cell types include Pneumatic, Hydraulic, and strain gauge. Hx711 and Load cell Interfacing with Arduino, Circuit Diagram: Arduino HX711 and Load cell