{"product_id":"adafruit-hx711-24-bit-adc-for-load-cells-strain-gauges","title":"Adafruit HX711 24-bit ADC for Load Cells \/ Strain Gauges","description":"\u003cp\u003eIf you are feeling the stress and strain of \u003cs\u003emodern life\u003c\/s\u003e 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 \u003ca href=\"\/search?q=Strain+Gauge\u0026amp;narrow_by=\u0026amp;sort_by=relevency\u0026amp;page=1\"\u003estrain gauges \/ load cells\u003c\/a\u003e or other sensors that have four wires that are connected in a \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Wheatstone_bridge\"\u003eWheatstone bridge arrangement\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eEach breakout comes with an HX711 ADC chip, plus some support circuitry, and a 6 port terminal block that can be used to connect one or two 4-wire sensors. The E-pad connects to the ground (often a black wire), and the E+ pad connects to the power voltage supplied to the HX711 (often a red wire).\u003c\/p\u003e\n\u003cp\u003eThen A- and A+ pads connect to the differential outputs from the bridge. For example, when 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.\u003c\/p\u003e\n\u003cp\u003eAs 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 \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_NAU7802\"\u003eArduino library\u003c\/a\u003e or \u003ca href=\"https:\/\/github.com\/adafruit\/CircuitPython_NAU7802\"\u003eCedarGrove's CircuitPython\/Python library\u003c\/a\u003e to configure and read the ADC for fast interfacing. \u003cstrong\u003eNote that this sensor has a fixed I2C address, if \u003ca href=\"https:\/\/learn.adafruit.com\/working-with-multiple-i2c-devices\"\u003emultiple sensors are desired on one I2C bus, a multiplexer can be used\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis sensor uses a two-wire protocol, similar to SPI. If you want a similar sensor but I2C, check out the \u003ca href=\"\/products\/adafruit-nau7802-24-bit-adc-stemma-qt-qwiic\"\u003eNAU7802 breakout\u003c\/a\u003e we make. We based this design on the excellent \u003ca href=\"\/products\/sparkfun-load-cell-amplifier-hx711\"\u003eSparkfun HX711 breakout\u003c\/a\u003e: 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.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHX711 Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo selectable differential input channels\u003c\/li\u003e\n\u003cli\u003eOn-chip active low noise PGA with gains of 32 (B), and 64 or 128 (A)\u003c\/li\u003e\n\u003cli\u003eOn-chip power supply regulator for load-cell and ADC analogue power supply\u003c\/li\u003e\n\u003cli\u003eOn-chip oscillator requiring no external component with optional external crystal\u003c\/li\u003e\n\u003cli\u003eOn-chip power-on-reset\u003c\/li\u003e\n\u003cli\u003eSimple digital control and serial interface\u003c\/li\u003e\n\u003cli\u003eSelectable 10SPS or 80SPS output data rate\u003c\/li\u003e\n\u003cli\u003eSimultaneous 50 and 60Hz supply rejection\u003c\/li\u003e\n\u003cli\u003eCurrent consumption including on-chip analogue power supply regulator:\u003cbr\u003enormal operation \u0026lt; 1.5mA, power down \u0026lt; 1uA\u003c\/li\u003e\n\u003cli\u003eOperation supply voltage range: 2.6 ~ 5.5V\u003c\/li\u003e\n\u003cli\u003eDimensions: 25.5mm x 23.0mm x 12.1mm\u003c\/li\u003e\n\u003cli\u003eWeight: 3.9g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":50847314280721,"sku":"ADA5974","price":9.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/adafruit-hx711-24-bit-adc-for-load-cells-strain-gauges-adafruit-ada5974-42436563697859.jpg?v=1735210790","url":"https:\/\/abcd3032.myshopify.com\/products\/adafruit-hx711-24-bit-adc-for-load-cells-strain-gauges","provider":"Tayyab Zak","version":"1.0","type":"link"}