LEGO Rubik’s Cube
Is there anything LEGOs can’t do? The idea of building a working Rubik Cube has always appealed. Here the challenge is to create a mechanical device that has a number of degrees of freedom about a central point. It’s not easy! The cube consists of 12 edge pieces, 8 corner pieces and one central piece. All of these have to be interlocking, yet still be able to rotate about any axis at any time in any direction. Link.
            
              
		
		
Part one was the 
		
		
Here’s a follow up to our 
		
No plans or how-to yet, but check out this homemade 3D printer “I’ve constructed a prototype turntable from Meccano that automatically lowers itself up to 60mm, currently at 0.75mm per revolution though this can be changed. This is intended for use in experiments in continuously extruding recycled HDPE…Recent fabrications include a 18mm high 19mm diameter cylinder with 0.85mm walls, and a 13mm high 43mm diameter cylinder with 1.75mm walls. Each layer is 0.25mm thick. It’s fascinating to watch in the same way as a potter is, at work on their wheel“. [Via 
		
All lawn mowers have one basic flaw.  Get rid of it and it’s much lighter, goes faster, goes under low branches and between bushes, turns on a dime, saves gas, mows in the rain and lets you have fun to as well. That flaw is the rider.  So we made radio-control mowers. Here’s a good resource for making your own remote controlled lawnmowers. 
		