He posts several other useful resources, some of which were the inspiration that got him started making these automata. All of them are pretty interesting, so do take a look at them too.
[Dug North] is a creator of such inventions, making automata out of wooden gears, cogs, and cams. [Dug]’s inventions are simple compared to turbine engines, but they still retain an artistry all ...
push-down automata, grammars, and Turing machines via a series of problems of increasing difficultly. Problems are organised by topic, many with multiple follow-ups, and each section begins with a ...