While I don't have an exact parts list, I can tell you what I used:
Essentials
Project Box ~$7 (Active Electronics)
120VAC -> 24VDC Transformer ~$13 (Active Electronics)
Float Switch ~$12 (fellow reefer)
DPDT Solid State Relay ~$5 (Active Electronics)
Extension cord (10m) ~$10 (Cnd Tire)
Misc Parts/tools
Solder
Grommets
Merets
Twist Ties
Old 35mm film cannister
Door hooks
Nylon nuts/bolts
Multimeter
It took me about 1 hr to do. The longest part is the hanging bracket. Takes me forever to drill all those little holes.
I don't have a schematic as I didn't really follow a particular one. I had my friend who has done a lot with electronics come by and help me figure out the relay as I've never used them before, but once that was sorted out, it went fairly smoothly. You can use this schematic taken from ReefKeeping.com:
(if the picture doesn't load, go to the article found here:
http://reefkeeping.com/issues/2002-03/jg/index.htm)
A couple of things I don't like about this particular box is that 1)the wires from the switch are very short. As a result, if you are mounting the float switch in your tank, you'll need to put the box either in your canopy or somehow mount it on the aquarium since the cord won't reach if you place it on the floor. 2) the box is quite large. I need to figure out a way to cram everything into a smaller box so it doesn't take up as much space.