# Adafruit HX711 24-bit ADC

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/130/744/medium800/adafruit_products_5974-04.jpg?1718736771)

If you are feeling the stress and strain of a Wheatstone bridge and you want to quantify it, this handy breakout will do the job, no sweat! The **Adafruit HX711 Breakout** contains a super-high-resolution 24-Bit differential ADC with extra gain circuitry that makes it perfect for measuring strain gauges / load cells or other sensors that have four wires that are connected in a [Wheatstone bridge arrangement](https://en.wikipedia.org/wiki/Wheatstone_bridge).

![](https://cdn-learn.adafruit.com/assets/assets/000/130/745/medium800/adafruit_products_5974-02.jpg?1718736827)

Each breakout comes with a HX711 ADC chip, plus some support circuitry, and 6 port terminal block that can be used to connect one or two 4-wire sensors. The **E-** pad connects to ground (often a black wire), the **E+** pad connects to the power voltage supplied to the HX711 (often a red wire).

![](https://cdn-learn.adafruit.com/assets/assets/000/130/746/medium800/adafruit_products_5974-03.jpg?1718736868)

Then **A-** and **A+** pads connect to the differential outputs from the bridge. For example, connecting to a strain gauge these tend to be the white and green wires. If you have a second gauge or voltage you want to measure, you can use the **B-** and **B+** pads. On the A channel, you can select 64x or 128x gain. On the B channel, you have a fixed 32x gain.

![](https://cdn-learn.adafruit.com/assets/assets/000/130/747/medium800/adafruit_products_5974-01.jpg?1718736931)

This sensor uses a two-wire protocol, similar to SPI. If you want a [similar sensor but I2C, check out the NAU7802 breakout](https://www.adafruit.com/product/4538) we make. [We based this design on the excellent Sparkfun HX711 breakout](https://www.sparkfun.com/products/13879): incorporating their split analog/digital supply and digital supply filtering. We then made a few tweaks: pre-soldered terminal blocks, the second bridge exposed, and a slide switch to change between 10 SPS and 80 SPS rates.

- [Next Page](https://learn.adafruit.com/adafruit-hx711-24-bit-adc/pinouts.md)

## Primary Products

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

[Adafruit HX711 24-bit ADC for Load Cells / Strain Gauges](https://www.adafruit.com/product/5974)
If you are feeling the stress and strain of  ~~modern life~~  a Wheatstone bridge and you want to quantify it, this handy breakout will do the job, no sweat! The ** Adafruit HX711 Breakout**  contains a super-high-resolution 24-Bit differential ADC with extra...

In Stock
[Buy Now](https://www.adafruit.com/product/5974)
[Related Guides to the Product](https://learn.adafruit.com/products/5974/guides)

## Featured Products

### Strain Gauge Load Cell - 4 Wires - 1Kg

[Strain Gauge Load Cell - 4 Wires - 1Kg](https://www.adafruit.com/product/4540)
A strain gauge is a type of electronic sensor used to measure force or strain (big surprise there). They are made of an insulating flexible backing with a metallic foil pattern. The resistance of a strain gauge changes when force is applied and the...

In Stock
[Buy Now](https://www.adafruit.com/product/4540)
[Related Guides to the Product](https://learn.adafruit.com/products/4540/guides)
### Strain Gauge Load Cell - 4 Wires - 10Kg

[Strain Gauge Load Cell - 4 Wires - 10Kg](https://www.adafruit.com/product/4542)
A strain gauge is a type of electronic sensor used to measure force or strain (big surprise there). They are made of an insulating flexible backing with a metallic foil pattern. The resistance of a strain gauge changes when force is applied and the...

Out of Stock
[Buy Now](https://www.adafruit.com/product/4542)
[Related Guides to the Product](https://learn.adafruit.com/products/4542/guides)
### Strain Gauge Load Cell - 4 Wires - 5Kg

[Strain Gauge Load Cell - 4 Wires - 5Kg](https://www.adafruit.com/product/4541)
A strain gauge is a type of electronic sensor used to measure force or strain (big surprise there). They are made of an insulating flexible backing with a metallic foil pattern. The resistance of a strain gauge changes when force is applied and the...

In Stock
[Buy Now](https://www.adafruit.com/product/4541)
[Related Guides to the Product](https://learn.adafruit.com/products/4541/guides)

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