Re: Entry lighting
I'm planning to use bistable flip flop solenoids for this purpose. These were originally used in old pinball type arcade games, and also in some soda machines, and assorted other uses.
The way these work is that there is a solenoid with a spring, and two microswitches. When actuated with a momentary voltage (a momentary push button switch for example), the solenoid "fires" and pulls down on the pin, which operates similarly to a click type ink pen. Each firing of the solenoid causes the pin to move from one side to the other, depressing one microswitch or the other. The microswitches have a normally open as well as a normally closed setting, so can be used either way.
With this setup, my circuits will have 1 source for power, controlled by the flip flop. I can put push buttons anywhere, and tie them to the solenoid on one side, and ground on the other. A fused 12V source for the other side of the solenoid, and I'm good to go. I'll be able to push a button at the door, or the driver's seat, or the living room, or the head, or the bedroom, or wherever I decide to wire it. I plan to use multi wire stranded cable to wire each control panel.
If a circuit needs more current than the controller can handle, I can easily use a relay to control the higher current circuit.
hope this helps,