Homemade weighing scale - Calibration and readout scale

This post helps you to calibrate your homemade weighing scale and creates a printable readout scale that you can glue onto the device. The post will guide you through the entire calibration process, establish a functional relation between mass and indicator position (the process is termed regression), and lets you configure the appearance of the scale. Finally, you obtain a file that you can print on a black/white printer.

To allow you reading through the page and trying out the tools without doing the calibration, I provide example data from my prototype weighing scale.

Show me the tools!

Homemade weighing scale - Construction and Plans

This post provides a tutorial and plans for a homemade weighing scale, similar to a classical letter scale. You obtain a scale that you can easily adjust to have the range of your needs, be it for only 20 grams like my prototype shown on the left, or for 100 or 200 grams.
Accompanying this post, I provide a tutorial and JavaScript tool that allows you to easily calibrate the weighing scale and that produces a fancy readout scale that you can print and attach to the device.
The video below demonstrates usage and accuracy of the prototype.

Homemade weighing scale.

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The Awkward Fisherman Machine - construction manual & plans

This post provides plans and construction manual for my "Awkward Fisherman Machine". It is a flying pendulum, designed as a fisherman constantly throwing the line onto a tree. Driven by a sinking weight, the sculpture runs for several minutes with its continuously fruitless attempts. Watch a video of the sculpture below.

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