The HX711 is a versatile integrated circuit (IC) designed for precision analog-to-digital (A/D) conversion, particularly suited for strain gauge load cell applications. It features a 24-bit A/D converter with a differential input stage capable of handling both single-ended and differential input signals. Additionally, this device offers adjustable gain amplification to accommodate various load cell sensitivities. HX711 module. A common module based on the HX711 available in the market, including on AliExpress , is shown below. This module utilizes its internal analog supply regulator, which ensures a stable analog supply (AVDD) for the ADC and other internal components. The output voltage of the regulator (AVDD) is calculated using the following formula: V AVDD = V BG × (R1 + R2) / R2. AVDD voltage test setup. According to the electrical characteristics listed in the datasheet, the reference bypass voltage (V BG ) is 1.25V. For the modules mentioned, R1 is set at 8.2kΩ and R2 at 20k...
This blog contains electronic, amateur radio, and embedded system projects, which I did during my free time. Unless otherwise noted, all the articles and projects described on this blog are based on my original designs.