Mechanical Turing machine

I have built two demonstration mechanical Turing machines, based on the 5-symbol, 2-state model. Neither of them work perfectly - this is still a work in progress. I'm intending to put a full writeup here in due course, but in the meantime, here is a link to some of the blog posts I made during development:

http://srimech.blogspot.com/search/label/turingmachine

Blog articles

• Mechanical array logic
• Mechanical decoder logic
• Langton's Ant with Hexbugs
• Sliding plate logic gates
• AVR Minimus servo controller
• Zeta toggle-switch computer
• Rule 110 automaton, version 2
• Failed experiment: Water logic gates
• Grue detection t-shirts
• Error correction of the NPL time signal
• Simple, headphone-controlled phone robot
• More 2D Game demos
• Investigating Raspberry Pi performance problems
• 2D Platform games with PyGame
• Exhibiting the Mk2 Turing machine
• Chorded keyboard for mobile phones
• Automating layout of laser-cut models

Projects in progresss:

Rule 110 automaton, version 2

Mechanical Turing machine

Finished projects:

Robot Wars 2003

12 volt mains

Electric pressure gauges

Chorded keyboard for mobile phones

Simple, headphone-controlled phone robot