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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Marble Maze Cube (simple) - Plans

Time for another plans post! Here is a construction manual with plans for a very simple version of my marble maze cube. The idea is a three-dimensional, hidden maze through which one has to guide a marble or steel ball.
This cube contains one of the most simple mazes possible, where each "floor" can be solved alone to get to the next one. More complicated versions contain more changes between the floors.
Be sure to watch the time-lapse video of the simple construction process below before reading the manual! A 3D stereoscopic version of the video is available here.

Marble maze cube, time-lapse of construction.

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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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Hanging Mobile #001 - construction manual & plans

This article comprises plans and a brief construction manual for Hanging Mobile #001, shown on the left. Below, you can watch a video of the harmonic motion of the mobile. The design is inspired by the work of Alexander Calder.

Contents
1. Materials and Tools
2. PDF Plans for download
3. Construction Manual

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