TOOLS

Gearing Ratio Calculator

Check out the Beta version my Lego Technic Gearing Ratio Calculator Tool:

This tool allows you to upload your Lego Technic project .ldr file and analyse the gearing ratios between any two connected gears or axles. Currently supports most gears, axles, worm gears, some differentials, cv joints and universal joints. See the video tutorial on how to use it. It is a work in progress and I would love to hear your feedback on it. Click here to try it out.

Note: As of 25 Septemeber 2021 the tool supports CV joints, linear speed via the radius of the component and improves on the frame rate for higher numbers of parts in a model).

Technic Elbow Art

This is a tool to create "Lego Technic Elbow Art" - a series of intertwined elbow pieces as a single sequence. Choose your dimensions and search parameters and search for new dense solutions and set a record! 

Download your Elbow Art as an .ldr file and build it yourself. Click here to try it out!

Lego Technic Binary Counting Machine - You have to see this fascinating counting machine

12 May 2020

A Lego Technic MOC modular binary counter is presented and used to measure the RPM of a large Lego Technic motor. The counter is constructed of a series of 4 sides reels each representing 2 bits. These are held at neat 90 degree angle multiples by a micro stepper mechanism. The overflow bits are carried to the next reel using a 4 knob wheel pushed by a small lever arm from the previous reel. The design is modular such that multiple modules can be combined to create a larger counter. The counter demonstrated is made from 3 modules and can count from 0 to 4095 in binary.

More to explore

Lego Technic MOC Timer Gadget

25 Apr 2020

An unconventional Lego Technic MOC timer gadget is presented. It is based on 4 pins holding back a liftarm that stops the timer. Each pin is motor driven by a different gearing ratio such that the liftarm can only move once all pins align. This only happens when the number of turns of the main ax...read more

Lego Technic MOC Programmable Controller

5 May 2020

Here I present a Lego Technic MOC programmable controller to control two independent Lego Technic functions simultaneously. The controller uses two tank tracks with pins on them to select between neutral, forward and reverse to control a small crane. The timing of the switching can be controlled ...read more

New Flat 12/20 Gear Friction

23 Apr 2022

The Lego Technic set 42140 App-Controlled Transformation Vehicle introduces two new gears - a flat version of the 12 tooth bevel gear and a flat version of the 20 tooth bevel gear. These gears are designed to have less friction.

In this video I measure the difference in gearing efficiency...read more

Lego Technic Pi Day Machine

14 Mar 2022

 

Here I present a Pi Day special Lego Technic machine that produces a gearing ratio of Pi/8 using a 56mm wheel driving a 13x13 square wheel.

The correctness of the ratio is confirmed by matching it with output of a 2 differential gearing system that produces a ratio of 355/9...read more

Lego Technic Powered Up Tutorial 2 - Speed Control

19 Feb 2022

This is my second Lego Technic Powered Up Tutorial that focusses on Lego Technic motor speed control using the Powered Up hub and Powered Up programming interface. The Lego Powered Up App is run on a Samsung Android tablet. I demonstrate how to set and control the power level applied to a motor.<...read more

Lego Technic Table Tennis Robot

25 Dec 2021

A Lego Technic Table Tennis robot is demonstrated. The table tennis robot can launch balls at up to 10 m/s using two lego technic buggy motors driving a pair of 46mm wheels. The ball baskets holds up to 60 balls that can be fired at the player at an adjustable rate of between 1 ball per second to...read more

Measuring Gearbox Efficiency

6 Nov 2021

This video describes a method for measuring the efficiency of a gearbox using the Lego Technic Powered Up hub. Gearbox efficiency is defined as the ratio of the output power to the input power and here I show how to measure each of these values to allow you to calculate the overall efficiency.read more

Lego Technic RC Forklift

15 Oct 2021

Here I present a Lego Technic Remote Control Forklift model. The model uses articulated steering implemented with a Power Functions Servo motor, and is powered by a PF Large motor. The forks are raised and lowered with two PF medium motors driving worm gears which in turn drive via a 24 tooth clu...read more

Lego Technic Powered Up Tutorial 1

3 Oct 2021

This tutorial is for beginner Lego Technic Powered Up programmers. It teaches how to turn motors on and off, read and set their axle angles as well as axle calibration using the Powered Up app on the google store or apple store.

...read more