M5Stack Mini Weight Unit (HX711) Load Cell Amplifier

This weight unit integrates a HX711 24 bits A/D chip that is specifically designed for a electronic weighing device. The input multiplexer selects either a Channel A or B differential input to the low-noise programmable gain amplifier (PGA). Channel "A" can be programmed with a gain of 128 or 64, corresponding to a full-scale differential input voltage of ±20mV or ±40mV respectively. Channel B has a fixed gain of 32. There is no programming needed for the internal registers. All controls to the HX711 are through the pins. In the test, we have this unit channel A to connect a pressure sensor. Then, use M5Core screen to display the weight data. Features

* Two selectable differential input channels

* On-chip active low noise PGA with selectable gain of 32, 64 and 128

* On-chip power supply regulator for load-cell and ADC analog power supply

* On-chip oscillator requiring no external component with optional external crystal

* On-chip power-on-reset

* Simple digital control and serial interface: pin-driven controls, no programming needed

* Selectable 10SPS or 80SPS output data rate

* Simultaneous 50 and 60Hz supply rejection

* Current consumption including on-chip analog power supply regulator: normal operation < 1.5mA, power down < 1uA

* Operation supply voltage range: 2.6 ~ 5.5V

* Operation temperature range: -40 ~ +85°C

* 16 pin SOP-16 package

* Program Platform: Arduino, UIFlow(Blockly, Python)

* Two Lego-compatible holes

Package Contents

* 1x Weight Unit

* 1x Grove Cable

Specifications

Resources Parameter

Net weight 8g

Gross weight 20g

Product Size 40 x 24 x 12mm

Package Size 67 x 53 x 12mm

Resources

* Documents