How to add intelligence to our homes? - Part 2

This is the long overdue update of the house project conceptualized a while back with my kids.  In this project, a model house was wired for simple lighting using LED's.

 

The USB home

Each part or room in the model house will be lit by a dedicated LED and each LED will be directly connected to the pins of the microcontroller, in this case, the Arduino Uno.

 

The Arduino Uno wired using a recycled IDE cable

The Arduino being wired

The Arduino will act as a hardware controller/driver to power up the LED's but commands will come from a PC.  This whole architecture can be ported to a real, full sized house and control is not limited to lighting only but for the purposes of demonstration, the model house should be sufficient to illustrate.

The GUI in a Windows PC



The GUI showing the check boxes and sliders as control inputs

The model home is connected to the PC via the USB port.  The Uno will function as a slave unit with the PC as the master.  If a user clicks on the GUI, the corresponding LED will light up (or toggle off) in the actual model home.  This therefore illustrates how a real USB controlled home can be made possible.

Engineering decisions

Engineering decisions are always about compromises. In almost all practical situations, perfect solutions are difficult to come by. In a sense, the best solution is normally chosen from among a pool of options. Sometimes, the available options are relatively good and choosing is by maximum advantage. In some cases, the options are not as desirable and choosing is by minimum consequences. In either extreme case, a better decision will still create the best benefit.