in our house a computer is keeping track of temperatures, controlling lights etc. the general state of the house is summed up as green, yellow or red - everything ok, observe/warning or alarm, and this state is shown on a webpage. a webpage is ok, but a traffic light inspired lamp in the living room is better.materials
6 mm and 9 mm plywood.
20 mm fir.
led-bulbs and bulb holders.
remote controlled switches.
paint. the computer as a remote control
the switches from nexa
are controlled from the computer via a rfxcom transceiver