Load cell electronics

[last updated: 2019-01-29]
3d printing home page
Strength of printed parts
Measuring strength of printed parts
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• Load cells & Wheatstone bridges
• 50kg Bathroom Scale Load cells
• HX711 load cell amplifier
• 100g load cell:


100g Load cell


Load cell wiring to amp
• from the RobotShop.com
• Two M2.5 threaded holes on each end (6.0mm spacing)
• Arduino:
• The HX711 board communicates to the Arduino via i2c, using CLK and DAT lines.
However it does not use the Wire.h library, so not sure how it works.
• Get documentation and example programs from (link to:) github repository
• click "Clone or Download", then "Download ZIP"
• Select Save File, click OK
• Navigate to directory where you saved it, select the zip file, then Extract and Extract All.
• There are 4 Arduino .ino programs in the "firmware" folder
• Get library from (link to:) Bogde on github
• click "Clone or Download", then "Download ZIP"
• Follow directions Here to save and install library
• Open Arduino IDE and open the Calibration program in the firmware folder from github.
Save-as to a new location. (see: software management)
• Connect hardware & electronics:
• Mount load cell in scale
• Connect load cell to HX711 - see diagram above
• Connect HX711-CLK to Arduino-2, and HX711-DAT to Arduino-3
• Connect HX711-Gnd to Arduino Gnd
• Connect HX711-VCC & VDD to Arduino +5v out
• Load calibration program to Arduino
• run and test it:

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eof