After building an automatic LEGO CVT that adjusts its gear ratio under resistance, the real challenge was proving it works. While the drop in output speed was visible, I needed a way to measure the ...

The challenge in creating new shapes with a LEGO spirograph lays in swapping in new gears, just like the original toy, and having more ways to come up with unusual gear ratios makes for more ...

One interesting problem that [Pepijn] ran into, and which he explains in great detail on his blog, is that LEGO gears can only provide a very limited set of gear ratios. In order to match the tide ...