Here’s the electronics and firmware side of things to support the Airtripper Extruder Filament Force Sensor, which includes the Arduino load cell circuit and the Arduino Sketch. Follow the guides in this edition to obtaining the parts, to calibrate the Arduino load cell circuit and then to calibrate the load cell for accurate weight measuring.
To support the Airtripper Extuder Filament Force Sensor and other projects involving load cells, this article will cover some ideas in acquiring load cells and getting them ready for calibration. The article will cover the pros and cons of buying a bare load cell or buying electronic digital scales for the load cell inside. To finish off the article there are three electronic kitchen scale teardowns to reveal the load cells inside, and you will see how the scale enclosure & platform can be re-assembled for calibration purposes. A separate article will follow to cover load cell calibration.