Adafruit HX711 24-bit ADC for Load Cells / Strain Gauges

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.