sp4rky wrote:Yeah, that's the basic theory
you start needing a pretty powerful supply if you change too many points at once afaik. If you could find a way of changing them all in sequence from 1 button press then you'd only need a little power supply.
Gaugemaster (and others) sell CDUs - capacitor discharge units - which do exactly what you'd expect given the name: charge up then release a big lump of current when you throw the switch. Mine claims to be able to throw six points motors in one shot although I suspect that's a bit optimistic.