Reed switches can easily be matrixed, as they're simple switches. So just look at regular push button matrixes, and replace the push buttons by reed switches.
Triggering the switch in the neighbouring square is a potential issue indeed.
Reed switches can easily be matrixed, as they're simple switches. So just look at regular push button matrixes, and replace the push buttons by reed switches.
Triggering the switch in the neighbouring square is a potential issue indeed.