SKU: 24311135969

SparkFun SparkFun Load Cell Amplifier - HX711

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Description

SparkFun SparkFun Load Cell Amplifier - HX711The SparkFun Load Cell Amplifier is a small breakout board for the HX711 IC that allows you to easily read load cells to measure weight. By connecting the amplifier to your microcontroller you will be able to read the changes in the resistance of the load cell, and with some calibration you? ll be able to get very accurate weight measurements. This can be handy for creating your own industrial scale, process control or simple presence detection. This

The SparkFun Load Cell Amplifier is a small breakout board for the HX711 IC that allows you to easily read load cells to measure weight. By connecting the amplifier to your microcontroller you will be able to read the changes in the resistance of the load cell, and with some calibration you?ll be able to get very accurate weight measurements. This can be handy for creating your own industrial scale, process control or simple presence detection.

This version of the SparkFun Load Cell Amplifier features a few changes that you specifically asked for! We have separated the analog and digital supply, as well as added a 3.3uH inductor and a 0.1uF filter capacitor for digital supply.

The HX711 uses a two-wire interface (Clock and Data) for communication. Any microcontroller?s GPIO pins should work, and numerous libraries have been written, making it easy to read data from the HX711. Check the hookup guide below for more information.

Load cells use a four-wire Wheatstone bridge configuration to connect to the HX711. These are commonly colored RED, BLK, WHT, GRN and YLW. Each color corresponds to the conventional color coding of load cells:

  • Red (Excitation+ or VCC)
  • Black (Excitation- or GND)
  • White (Amplifier+, Signal+ or Output+)
  • Green (A-, S- or O-)
  • Yellow (Shield)

The YLW pin acts as an optional input that is not hooked up to the strain gauge but is utilized to ground and shield against outside EMI (electromagnetic interference). Please keep in mind that some load cells might have slight variations in color coding.

Note: Special thanks to Bodge for supplying the Library for the HX711!

Features:

  • Operation Voltage: 2.7V–5V
  • Operation Current: < 1.5mA
  • Selectable 10SPS or 80SPS output data rate
  • Simultaneous 50 and 60Hz supply rejection

Documents:

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SKU: 24311135969

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Kindle Customer
Omaha, US
★★★★★ 5
Highly recommended
Format: Kindle
Very well written. Everything is clear and well organized. It serves as a good overview of the Ubuntu server and also as a rich reference for specific arguments.
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Reviewed in the United States on November 27, 2022
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Dean T
Houston, US
★★★★★ 5
Another phenomenal product from Jay
Format: Paperback
The latest version provides everything one needs to create and secure an Ubuntu server. Fantastic book Jay!
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Reviewed in the United States on February 23, 2023
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Vic Malone
Carnegie, US
★★★★★ 5
Very useful book on the latest Ubuntu distro
Format: Paperback
Disclaimer: Longtime follower and subscriber to Jay LaCroix’s YouTube site, Learn Linux TV. Several high quality authors (Jang, van Vugt, and Ghori the most well known) have been introducing new comers looking for more in-depth guides to Linux to the Red Hat world through their RHCSA Study Guides. The same cannot be said for Ubuntu. While books do exist for Ubuntu, they are too general in this reviewers opinion. A noted exception is Matthew Helmke. The other is Jay LaCroix. Mastering Ubuntu Server, 4th Edition by Jay LaCroix addresses Canonical’s latest Ubuntu release, 22.04 LTS (Jammy Jellyfish). Mr. LaCroix’s book follows the same outline as the RHCSA books of installation, user management, package management, navigating the file system through the terminal, command-line usage, up to and including storage and networking. These chapters lay a solid foundation for the rest of the book, and all but one chapter ends with a section for further viewing or reading which either point to Mr. LaCroix’s well produced videos on his YouTube channel, Ubuntu’s wiki, or to one of several informative websites. The YouTube videos are a good complement to the book, and also raise the bar for what we as readers should expect from other authors and publishers. The last part of the book was my favorite. Where as the RHCSA books are confined to the scope of the test they are aimed at, Mastering Ubuntu Server has no restrictions. Chapters covering the installation of databases (MariaDB), web servers (both Apache and Nginx), virtualization (QEMU/KVM), containerization (LXD and Docker), Ansible, AWS, and Terraform along with their corresponding videos (except for Terraform) create a comprehensive learning platform. Having worked through some of these chapters along with the videos, one does get up to speed much quicker in understanding while adding a new skill to their skillset. This is important in a competitive job market. I would recommend Mastering Ubuntu Server, 4 th Edition highly to anyone wanting something current for the 22.04 LTS distribution. Having said that, I do have some admittedly subjective criticisms. In the chapter on storage, the fdisk command is introduced for formatting and partitioning disks. In an industry where it is becoming less likely to install a hard drive of 2TB or less and manufacturers have 20TB hard drives in their product line, why not also introduce the gdisk command. My other criticism is directed at the virtualization chapter and its use of Virtual Machine Manager for KVM. I got my start working with KVM through the Virtual Machine Manager as well, but on the advice of a Systems Engineer I knew, transitioned to creating, configuring and managing all my VMs through the command-line only. I wished that the author pushed more in that direction. As I said, subjective opinions, and minor overall, for a well written book by Jay LaCroix.
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Reviewed in the United States on September 9, 2022
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Roger Beickel
Draper, US
★★★★★ 3
I should have looked somewhere else.
Format: Paperback
Not very helpful. I wanted a book that would help guide me through setting up a web server. There should have been a more complete step by step guide comparing traditional methods with newer updated methods.
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Reviewed in the United States on August 9, 2025
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princesscoldheart
Lake Worth, US
★★★★★ 5
Organized well. You can read it section by section. Fantastic information. Clearly presented.
I like this book better than "what to expect" because this one does a better job of what you'll ACTUALLY expect versus telling you the throngs of horrible things that could happen to you or your baby. I'd rather be informed than mentally prodded with scary information. On one hand, it's good to know what could happen, so the other books you've probably already ordered are good to skim through, but this book I recommend reading all the way through. Easy to read, you'll actually have TIME to read it because you can read the age your baby is instead of a book that's all mixed up and organized by diseases and threats. Clear photos and explanations and tips on how to make your life and baby's life easier and better. I've understood my baby's needs better because of this book. I feel really glad I got it because it was the only book that really helped my daily life with my newborn.
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Reviewed in the United States on November 21, 2013

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