LEGO Brick Dimensions and Measurements

The LEGO bricks are precisely designed to fit perfectly together. There is a 0.2mm gap between bricks next to each other. The gap between two bricks stacked on top of each depends on how careful to pressed them down. Of course there are several websites that show you the exact measurements, but some of them were a bit confusing or even broken.

LEGO 2×4 Brick (3001)

I enjoy working in 3D so I used Fusion 360 to create this technical drawing of the LEGO Brick. You can download the model over at GrabCAD and the PDF file from here.

lego-2×4-brick-dimensions-measurements-3001

LEGO 2×4 Plate (3020)

This plate is 1/3 of the height of a normal brick. You can download the model at GrabCAD and the the PDF file from here.

lego-2×4-plate-dimensions-measurements-3020

LEGO 1×4 Technic Brick (3701)

The technic bricks have a hole in the side for pin connectors or axles to go through. I had to cut open a brick to get the exact design of the inside tubes right. The model is available at GrabCAD and the PDF file from here.

lego-1×4-technic-brick-dimensions-measurements-3701

Draft Proposal for a Memorial Exhibit about the Christchurch Mosque Tragedy At the Christchurch Brick Show 2019

Proposal for a LEGO memorial for the Christchurch Mosque Shooting victims.

On Friday March 15th 2019 New Zealand experienced its biggest terrorist attack in Christchurch that took the lives of 50 people. The loss to their families and their community is indescribable. It is our responsibility to pay respect to the victims, their families and their communities. Moreover, we must take action to prevent that such an event will ever happen again.

For this purpose we propose to build a memorial exhibit for the Christchurch Brick Show. The exhibit will consist of two parts.

Continue reading “Draft Proposal for a Memorial Exhibit about the Christchurch Mosque Tragedy At the Christchurch Brick Show 2019”

LEGO Digital Crawler with EV3 Controlled Gear Box

This LEGO remote controlled crawler uses a sequential gearbox from Sariel and a Mindstorms EV3 to control the car. The remote control used force feedback and offers proportional control over speed and direction. It also allows you to change gears and change the forward and backward drive. The two EV3 Mindstorms communicate using Bluetooth. The remote uses two rotation sensors to measure speed and direction.

The building instructions are available for LEGO Digital Designer and Stud.io. Please notice that I had to replace the 35188 Technic Changeover Rotary Catch with another gear in the digital model and I could also not include Mindsensors Glide Wheel Rotation Sensor. These bricks do not yet exist in digital form. I also put up the model are ReBrickable and the inventory there is almost complete. Feel free to also use different wheels. In the LDD model I also had to use other shocks.

Here is a video that explains the model’s function:

And here is the crawler in action:

 

 

Race3 Extreme Offroad Car

I built a new version of my Race cars series (Race1, Race2) with the logical name Race3. This time I am using the SBrick to control the car which gives its proportional steering control. This is great for driving curves. Race3 features individual suspension, ball bearings and a very low centre of gravity. You can drive it up and down pretty much any rock or mountain. Here is a video of what it can do.

And here are some photos of the model. Building instructions are also available. I also put up this MOC over at Rebrickable.

Comparison of LEGO Render Tools

Building LEGO digitally has many advantages, such as having an unlimited number of bricks at your disposal. While these digital models can be shared it is also desirable to create a photorealistic rendering of the final model. There are currently three major software packages to build digital LEGO:

  • LEGO Digital Designer
    This is the most comfortable editor for all platforms, but LEGO’s support for this software is in doubt. The build in render engine is not the best, but you can use Bluerender that in turn uses PovRay for rendering your model.
  • LDraw
    Draw is the oldest software and it is maintained by the LEGO community. There are several different editor and render tools available.
  • Stud.io
    This software was developed by Bricklink and it uses LDraw for its parts and PovRay for the rendering. In its newest Beta version Stud.io is using a new render engine called Eyesight.
  • Mecabrick
    This online software runs in your browser and you need to pay for having your image rendered on theirs server farm. They did not have the L-Motor in their library and hence I could not render my model there.

So lets compare the results of the render engines. Below you find the rendered images of all software packages set to their maximum quality level. I also uploaded these images to Flickr. It is very clear that the new rendering engine from Stud.io is far superior to all other rendering engines and this alone might motivate you to adopt this software as your default LEGO digital design tool.

It is also interesting to notice how efficient Stud.io uses the computers computing power to render. Here is a screenshot of my CPU load during rendering: