What components are need to make a load cell with digital display

Sensors Force & Weight
1

I’d like to make an accurate load cell measurement tool that put the measured value on a digital display. What components do I need to buy from you to make this happen?

I saw it on this link: https://learn.sparkfun.com/tutorials/fo … -guide/all

but I want to use a load cell instead o force detector

2

Thanks for posting rm842.

There are a lot of ways to do this, but here are the parts I’d recommend.

  • - [[Load Cell - 10kg, Straight Bar (TAL220)](https://www.sparkfun.com/products/13329) - Load cell
  • - [[SparkFun Qwiic Scale - NAU7802](https://www.sparkfun.com/products/15242) - Load cell amplifier
  • - [[SparkFun RedBoard Qwiic](https://www.sparkfun.com/products/15123) - Controller
  • - [[SparkFun 16x2 SerLCD - Black on RGB 3.3V](https://www.sparkfun.com/products/14072) - LCD display
  • - [[Qwiic Cable - 200mm](https://www.sparkfun.com/products/14428) - Cable to connect amplifier to controller
  • - [[Qwiic Cable - Female Jumper (4-pin)](https://www.sparkfun.com/products/14988) - Cable to connect LCD to controller
    • [/list]

    You’re still going to need to write the code that ties everything together, but we have examples for the NAU7802 and SerLCD that would get you started. I’d recommend just connecting the NAU7802 to the RedBoard and load cell and playing with the example code for that to start with and comfortable with the code. Then connect the LCD to the RedBoard and get comfortable writing code for that.

    Once you have a good understanding on how both work, you can then merge your NAU7802 and SerLCD code together to display weights on the LCD rather than a computer screen.

    You might also want to have a look at the hookup guides below for more information on the two main parts and how they work.

  • - [[Qwiic Scale Hookup Guide](https://learn.sparkfun.com/tutorials/qwiic-scale-hookup-guide)
  • - [[AVR-Based Serial Enabled LCDs Hookup Guide](https://learn.sparkfun.com/tutorials/avr-based-serial-enabled-lcds-hookup-guide)
    • [/list]](https://learn.sparkfun.com/tutorials/avr-based-serial-enabled-lcds-hookup-guide)](https://learn.sparkfun.com/tutorials/qwiic-scale-hookup-guide)](https://www.sparkfun.com/products/14988)](https://www.sparkfun.com/products/14428)](https://www.sparkfun.com/products/14072)](https://www.sparkfun.com/products/15123)](https://www.sparkfun.com/products/15242)](https://www.sparkfun.com/products/13329)
    3

    Hello,

    Would you also need a 5V power supply as well for this?

    -Dan

    4

    Yes, you’d need some sort of power source as well.

    You could apply 5 volts to the RedBoards 5V pin or you could apply 7-15 volts from a [power pack or [battery to the barrel jack on the RedBoard for power](https://www.sparkfun.com/products/11855)](https://www.sparkfun.com/categories/28?filter_option[subcategory][]=category_308&filter_price_floor=&filter_price_ceil=)