A few things I made over the years that are worth keeping around. Nothing here is a research output — these are side projects and build instructions that people occasionally ask me for.
A small robot chassis built entirely from one cheap, off-the-shelf LEGO set. That was the whole point: no custom parts, no printing, no shopping list — buy the one set, follow the instructions, and you have a chassis. LEGO discontinued the set not long after the chassis was finished, which rather undermined the idea, but the instructions still work if you can find one second-hand or already have the parts.
