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 Ball Gun

7 Mar 2023

This lego technic ball gun can shoot 7.8mm plastic balls. The gun is driven by two pull back motors that drive the firing mechanism. The gun has a changeable magazine holding 12 balls. Youi recock the gun with a manual lever and then reload by pulling the reloading mechanism. The gun can fire up to 5 meters and is very accurate at short distances. It has sight and is modelled after a machine gun.

More to explore

Spirograph Machine

19 Dec 2023

Here I present a Lego Technic Spirograph machine programmed using Powered Up. The powered up controller is used to maintain the desired gearing ratio between the turn table and the inner gear to draw a spirograph that replicates the real original spirograph drawing toy.

Lego Technic RoboDog

9 Jan 2023

A four legged robot dog made out of Lego Technic is demonstrated. The robot is made of 4 powered up medium motors for the legs and one for the balancing mechanism on top. The robot dog can walk forward, backwards and can turn left and right. It is controlled via a Powered Up app program running o...read more

Lego Technic New 12/20 Gear High Speed Friction Test

21 May 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 follow up video I measure the high speed difference ...read more

How do you make a 1:N gearing ratio?

31 Oct 2021

How do you make a 1:5 gearing ratio?

7 Sep 2021

Lego Technic Gearing Ratio Tool Update

4 Sep 2021

This video presents updates to the Technic Brick Power Lego Technic Gearing Ratio Calculator tool specifically on underconstrained differential systems. These are systems in which the differentials are not fully constrained and therefore have 1 or more degrees of freedom within them.

The ...read more

Lego Technic Dual Function Gearbox

3 Mar 2021

This gearbox solves the problem of needing three lego technic motors to remotely control a car with 3 functions namely driving, steering and gear changing capability. The lego gearbox implements two functions at once by exploiting the direction of rotation of the driving motor and ...read more