Product description
Load cell amplifier with the HX711 ADC for connecting load cells to microcontrollers via Qwiic (I2C). The module features a pre-programmed ATtiny404 microcontroller that converts the HX711's digital output to I2C, making it easy to integrate with platforms such as Arduino, ESP32, and Raspberry Pi Pico. The built-in 24-bit analog-to-digital converter provides high resolution and accurate measurements for applications requiring precise weight or force sensing.
The amplifier features two differential input channels, allowing up to two load cells to be connected simultaneously. It can therefore be used both in simple scales with a single load cell and in systems using multiple load cells. The integrated voltage regulator provides a stable supply to the load cells, contributing to reliable and repeatable measurement results.
The module connects using a Qwiic cable that carries both supply voltage and I2C communication through a single connector. Two Qwiic connectors make it easy to daisy-chain multiple Qwiic devices on the same I2C bus. The I2C address is selected using an on-board DIP switch. Arduino and MicroPython libraries are available for quick integration into your own projects. The board is manufactured and tested in the EU by Soldered.
Specifications:
- ADC: HX711
- ADC resolution: 24-bit
- Differential input channels: 2
- Connection: 2 × Qwiic (I2C)
- Supply voltage: 2.6–5.5 V
- I2C address: 8 selectable (via DIP switch)
- Mounting holes: 2
- Dimensions: 38 × 22 mm
- Arduino library: Yes
- MicroPython library: Yes