Description
If you want to measure strain gauges or load cells with a Wheatstone bridge configuration, the Adafruit HX711 Breakout is perfect. It features a super-high-resolution 24-bit differential ADC with integrated gain circuitry ideal for precision measurements.
This breakout includes the HX711 ADC chip, support circuitry, and a 6 port terminal block for connecting one or two 4-wire sensors, providing easy hookup for load cells or strain gauges.
Wiring: The E- pad connects to ground, E+ to power, and differential inputs (A- and A+; B- and B+) connect to the sensor outputs. Channel A offers 64x or 128x gain, while Channel B has fixed 32x gain.
The board uses a two-wire serial interface similar to SPI, with selectable data rates of 10SPS or 80SPS controlled via a slide switch.
Use the Adafruit HX711 Arduino library for easy data reading.
- 24-bit ADC resolution
- Two selectable differential input channels
- On-chip low noise programmable gain amplifier (PGA)
- Integrated power supply regulator for analog components
- Selectable data rates: 10 or 80 samples per second
- Low current consumption: < 1.5mA normal operation, < 1uA power down
- Wide operating voltage: 2.6V to 5.5V
- Compact size: 25.5mm x 23.0mm x 12.1mm
- Lightweight: 3.9 grams
- Pre-soldered terminal blocks for easy sensor connections
- Compliance: RoHS 2 2011/65/EU and RoHS 2 2015/863/EU compliant
Based on the Sparkfun HX711 breakout design with enhancements including split analog/digital supply, digital supply filtering, and additional bridge channel access.
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