HX711 Dual-Channel 24 Bit Precision A/D weight Pressure Sensor

The HX711 is a highly integrated, dual-channel 24-bit precision analog-to-digital converter (ADC) specifically designed for weight and pressure sensing applications. It is a crucial component in load cells and pressure sensors, providing accurate digital conversion of analog signals with high resolution and stability.

One of the key features of the HX711 is its dual-channel architecture, allowing simultaneous measurement of two different sensors or load cells. This capability is particularly advantageous in applications where multiple inputs must be processed simultaneously, such as in weighing scales or pressure monitoring systems.

The 24-bit resolution of the HX711 ensures precise measurement of small changes in weight or pressure, enabling highly accurate and reliable data acquisition. This level of precision is essential in applications where even minor variations in sensor readings can have significant implications, such as in industrial process control or medical devices.

Furthermore, the HX711 integrates various features to enhance performance and flexibility. It includes an onboard programmable gain amplifier (PGA) with selectable gain settings, enabling optimization of the measurement range and sensitivity to suit different sensor configurations and environmental conditions.

The HX711 communicates with external microcontrollers or processors via a simple two-wire serial interface, making it easy to integrate into a wide range of embedded systems and platforms. It supports standard communication protocols such as I2C and SPI, providing compatibility with popular microcontroller development boards like Arduino and Raspberry Pi.

Additionally, the HX711 typically includes built-in voltage regulation and noise filtering mechanisms, ensuring stable and reliable operation even in noisy electrical environments. This feature helps minimize external interference and improves the accuracy of the measured data.

In summary, the HX711 dual-channel 24-bit precision ADC is a versatile and highly capable solution for weight and pressure sensing applications. Its high resolution, dual-channel architecture, and integrated features make it suitable for a wide range of industrial, commercial, and scientific applications requiring accurate and reliable measurement of weight or pressure.

The dual-channel 24 Bit Precision A/D weight Pressure Sensor Load Cell Amplifier and ADC HX711 Module is a small breakout board; for the HX711 IC that allows you to easily read load cells to measure weight. By connecting the module 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. The HX711 Weighing Sensor uses a two-wire interface (Clock and Data) for communication. Any microcontroller’s GPIO pins should work and numerous libraries have been written making it easy to read data from the HX711.

Load cells use a four-wire Wheatstone bridge to connect to the HX711. These are commonly colored RED, BLK, WHT, GRN, and YLW.

To know the HX711 Datasheet visit attachment.

Each colour corresponds to the conventional colour coding of load cells :

1. Red (Excitation+ or VCC).
2. Black (Excitation- or GND).
3. White (Amplifier+, Signal+, or Output+).
4. Green (A-, S-, or O-).
5. Yellow (Shield).

The YLW pin acts as an optional input that not hook up to the strain gauge; but is utilized to ground and shield against outside EMI (electromagnetic interference). Please keep in mind that some load cells might have variations in colour-coding.

Pinouts :

Analog Side :

1. E+: Excitation positive.
2. E-: Excitation negative.
3. A-: Channel A Negative Input.
4. A+: Channel A positive Input.
5. B-: Channel B Negative Input.
6. B+: Channel B positive Input.

Digital Side :

1. GND: 0V / Ground Power Connection.
2. DT: Data IO Connection.
3. SCK: Serial Clock Input.
4. VCC: Power Input.

Specifications and Features :

1. Recommended excitation voltage: 5-10V.
2. Two selectable differential input channels.
3. On-chip active low noise PGA with a selectable gain of 32, 64 and 128.
4. On-chip power supply regulator for load-cell and ADC analogue power supply.
5. Selectable 10SPS or 80SPS output data rate.
6. On-chip oscillator requiring no external component with optional external crystal.
7. On-chip power-on-reset.
8. Simple digital control and serial interface: pin-driven controls, no programming needed.
9. Simultaneous 50 and 60Hz supply rejection.

Package Includes :

1 x Weighing Sensor Dual-Channel 24 Bit Precision A/D weight Pressure Sensor with HX711 module.