This can be fixed by placing guards onto the grid, but I really want to avoid modifying the grid. Modifying an infinite tape requires infinite effort.
Error correction of the NPL time signal
Simple, headphone-controlled phone robot
Investigating Raspberry Pi performance problems
Chorded keyboard for mobile phones
Exhibiting the Mk2 Turing machine
Automating layout of laser-cut models
Turing Machine and Maker Faire
November Turing machine update
September progress on the Turing machine