The Load Cell Weight Sensor HX711 is a specialized sensor
designed for measuring weight and force using strain gauges. It has
several features that make it suitable for precise weight measurements:
1.
Two selectable differential input channels: This allows the sensor to
connect to two load cells or strain gauges simultaneously, providing
flexibility in the measurement setup.
2.
On-chip active low noise PGA (Programmable Gain Amplifier) with
selectable gain of 32, 64, and 128: The PGA helps amplify the weak
signal from the load cell, enabling accurate and sensitive weight
measurements.
3. On-chip power supply
regulator: The HX711 has an integrated power supply regulator to provide
stable and accurate power to the load cell and analog-to-digital
converter (ADC).
4. On-chip oscillator: The
sensor has an internal oscillator, so it doesn't require an external
oscillator component (e.g., crystal) for its operation.
5.
Simple digital control and serial interface: The sensor can be
controlled using simple pin-driven controls, and it communicates data
via a serial interface, making it easy to integrate into various
projects without complex programming.
6.
Selectable output data rate: The HX711 allows users to choose between
two output data rates of 10 samples per second (SPS) or 80 SPS,
depending on the specific requirements of the application.
7.
Simultaneous 50Hz and 60Hz supply rejection: This feature helps reduce
interference from power supply noise operating at both 50Hz and 60Hz
frequencies.
8. Low current consumption: The sensor operates with low power consumption, ensuring energy efficiency in various applications.
9.
Wide operating voltage range: The sensor can work within a voltage
range of 2.6V to 5.5V, providing compatibility with different power
supply configurations.
10. Operating
Temperature Range: The HX711 can operate in a wide temperature range
from -20 degrees Celsius to +85 degrees Celsius, making it suitable for
various environmental conditions.
Regarding the connection, the color coding for the wires is as follows:
- Red wire: Connects to the positive terminal (E+) of the load cell.
- Black wire: Connects to the negative terminal (E-) of the load cell.
- Green wire: Connects to the positive input (A+) of the differential channel.
- White wire: Connects to the negative input (A-) of the differential channel.
Overall,
the HX711 Load Cell Weight Sensor is a versatile and reliable sensor
widely used in applications that require accurate and precise weight
measurements, such as in scales, load cells, and other force sensing
applications.
