mathematics – Nico71's Technic Creations

Prytz / Hatchet Planimeter (2026 Version)

A Prytz / Hatchet Planimeter, made in 2013, now with free PDF instructions in an updated and improved version. If you want to learn measuring areas with LEGO, this is the tool you need !…

Maths Instrument : Integraph

LEGO Technic replica of an Integraph, a mathematics instrument created in 19th century by Abdank-Abakanowicz, for plotting the integral of a graphically defined function. Designed in 2011, finally with...

Bilateral Letter Scale

A fully mechanical bilateral letter scale, made in LEGO Technic, with dials from 0 to 175gr, perfect for antique objects enthusiasts or to decorate a desk. Instructions and Complete...

New Instructions for the digicomp !

A small post to inform you that the digicomp has now its pro-rendered Building Instructions !…

Mechanical Calculator

A mechanical calculator, which is capable to add and substrat, featured carry mechanism, keyboard, overflow mechanism and openable part for set up….

Calculator – Overflow

Here is the third part on my mechanical calculator machine, focused on overflow mechanism and how to make substraction….

Calculator – Keyboard

Here is the second part on my mechanical calculator machine, focused on keyboard system….

Orthogonal Planimeter

A mechanical device used for calculating area on an arbitrary shape….

Pritz Hatchet Planimeter

My first planimeter, very simple and very demonstrative to understand how a mechanical device can calculate area….

Lego computer : Digicomp

The digicomp was a mechanical computer sold as a plastic toy in 1963. Capable to count, multiply, divide, depending of how it is programmed….

Lego Mechanical Loom

The finished mechanical loom, designed for Fana’briques 2012 exhibition which took place the 29th, 30th June 2012….

Torque Limiter

An automatic switch-off torque limiter, designed to prevent damage by excessive torque….