A guy has posted on **broken link removed** (see first schematic) a circuit which he claims will crudely control a HDD stepper motor using a 74ac14 chip (I'm hoping he uses "stepper motor" as a simplification of "3-phase motor"). I don't have the skills to evaluate whether that has any chance of working. So can it? If so I'm going to try and build it; what are the complexities involved?