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 Powered Up 3 Speed Automatic Car

14 Aug 2021

 

This video presents a new lego technic 3 speed automatic RC car. The gearbox uses the lego technic powered up hub and 3 motors to drive, steer and switch gears. The car's 3 speed automatic gearbox has 3 forward speeds with gear ratios 1:1, 3:5 and 1:5 and has been programmed using the Powered Up app on an iphone to automatically switch gears based on the torque measurement on the output axle of the powered up XL motor.

The car is put to the test by driving into barriers and up a ramp to see the automatic gear switching in action.

More to explore

Powered Up 3 Speed Automatic Gearbox

10 Jun 2021

The lego technic Powered Up motors and functions have been used to create a lego technic 3 speed automatic gearbox. With the lego Powered Up functions you can accurately control motor speed and motor position, as well as being able to measure the angular position of a motor. These new possibiliti...read more

Lego Technic RC 3 SPEED CAR - change gears, drive and steer using remote control

19 Jan 2021

An improved version of a lego technic RC 3 speed gearbox is implemented into a remote control lego car. This video shows three main improvements over the previous gearbox design. The first is an improvement is to replace the 90 degree bugatti stepper  with a PF servo motor reducing the gearb...read more

Lego Technic 2 Speed Auto Car Ramp Challenge - Part 2

10 Dec 2020

A lego technic 2 speed automatic gearbox is put to the test by incorporating it into a lego 2 speed automatic car.  This lego 2 speed automatic gearbox implements a number of design principles aimed at improving the gearbox performance - namely of placing the torque detector on a separate pa...read more

Lego 2 speed automatic car. Part 1

3 Oct 2020

This video explores the use of the lego technic "smoothly switching 2 speed automatic gearbox" inside of a test car to see how well it works to climb up a ramp.

The gearing ratio of the 2nd gear of the 2 speed automatic gearbox can be set using a manual 4 speed gearbox to choose...read more

Lego Technic Powered Up 3 Speed Automatic gearbox 2

24 Jul 2021

This video presents a revised version of an earlier Lego Technic Powered Up 3 speed automatic gearbox. The previous gearbox used a differential for torque measurement and used a powered up large motor to convert the differential rotation into a torque measurement.

However as it turns out ...read more

Lego Technic Single Motor Tank V2.0

1 May 2021

Here I present my second new and improved version of a lego technic tank that is driven by a single lego power functions motor. In this version the gearing mechanism has been optimized and far fewer gears are used to create the four different track direction combinations, namely both forward, bot...read more

Lego Technic Single Motor Tank

1 Apr 2021

Here I present a lego technic tank driven by a single lego power functions motor. The lego RC tank can be controlled remotely using a single remote channel and driven forwards, backwards, and steered left and right. These functions are implemented by using a single large PF motor and exploiting t...read more

Lego Technic Servo Driven 3 Speed Automatic Gearbox

13 Feb 2021

A lego technic 3 speed automatic gearbox is presented using a lego technic power function servo motor to drive the gear change mechanism. The servo motor is driven by a lego electric switch which in turn is driven by a torque detector using a differential at the output.

The technic automa...read more

Lego Technic RC 3 Speed Manual Gearbox

11 Jan 2021

A Lego Technic 3 speed remote controlled gearbox is presented with the design process explained. The lego RC 3 speed gearbox allows you to change gears up and down using a power functions remote control. The 3 speed gearbox implements the gear changing mechanism using two parallel axles each with...read more

Lego Technic 3 Speed Automatic Gearbox - FAIL!

18 Sep 2020

This video presents a lego technic 3 speed automatic gearbox design that failed to work as expected. This design is based on an earlier design of a 2 speed automatic gearbox with smooth transmission that worked very well.  That technic gearbox was extended by adding another speed to the oran...read more