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

Sale price A$25.01   Inc. GST
72 units Ships in 7 to 10 days

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 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.

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).

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.

As the sensor is twisted and bent, the slight changes in resistance are converted to minuscule voltage changes that can be read by the HX711 ADC for converting into force or mass measurements. You can use our Arduino library or CedarGrove's CircuitPython/Python library to configure and read the ADC for fast interfacing. Note that this sensor has a fixed I2C address, if multiple sensors are desired on one I2C bus, a multiplexer can be used.

This sensor uses a two-wire protocol, similar to SPI. If you want a similar sensor but I2C, check out the NAU7802 breakout we make. We based this design on the excellent Sparkfun HX711 breakout: 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.

Technical Details

HX711 Specifications:

  • Two selectable differential input channels
  • On-chip active low noise PGA with gains of 32 (B), and 64 or 128 (A)
  • 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
  • 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

Product Dimensions: 25.5mm x 23.0mm x 12.1mm / 1.0" x 0.9" x 0.5"

Product Weight: 3.9g / 0.1oz

    Shipping rates Australia wide and New Zealand

    Please add the items in cart and proceed to checkout to calculate shipping cost. We have range of shipping options once goods are ready to dispatch. 
    1. Regular shipping: Goods will be shipped using Australia post regular shipping service. 
    2. Express shipping: Goods will be shipped using Australia post EXPRESS shipping service. 
    3. Express split shipping: Local stock from Melbourne will be shipped ASAP (1 business day) using EXPRESS shipment while remaining items from overseas stock when arrived in Melbourne shipped using second EXPRESS shipment. 
    4. Pick up from Thomastown, Melbourne is available on appointment between 9 am to 3 pm during business days. 



    • How do I estimate shipping for my order?
      • Add products in the shopping cart and head to the checkout page to estimate the shipping.

    Dispatch time

    Unless expressly agreed otherwise with you, we will not commence delivery of an order until we have received cleared payment of the purchase price in full.

    All orders placed before 11 am AEST (Monday to Friday) will ordinarily be processed on the same day.

    We will endeavour to ship the Products by the applicable time indicated on the website, but all times are indicative only.  All shipping times are dispatch times only, and actual delivery dates will depend on the shipping method chosen, delivery address and delivery service provider. 

    Note- Please make a note during purchase if you require any item urgently. However we cannot guarantee that we will be able to comply with any request

    *Go to Australia post delivery time calculation to get various Australia post service in your area please use our shipping postcode Thomastown, 3074 as the "from" address -

    Shipping Destinations

    We ship all products throughout mainland Australia, Tasmania and New Zealand - Including Darwin, Melbourne, Sydney, Tasmania, Adelaide, Brisbane, Perth, all metro and regional areas but do not deliver to areas in Australia where the Australia Post delivery network is not available. 

    Check Express shipping delivery coverage area at -

    Receipt of deliveries

    Deliveries to post office boxes are not permitted where delivery is by courier. If delivery is by courier and nobody is available at the delivery address to accept delivery when delivery is attempted then the courier may either:

    • leave the relevant parcel at the unattended address (the courier will do so if specified in your delivery requirements); or
    • re-attempt delivery at a later time or date, in which case we may charge you an additional re-delivery fee. 

    Note that if a delivery is left unattended at the shipping address and is subsequently stolen then the theft is your responsibility, not ours.

    Payment & Security

    Apple Pay Google Pay Mastercard PayPal Shop Pay Visa

    Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

    You may also like