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1. A Foot in the Front Door > 11. Control the Uncontrollable

Control the Uncontrollable

The universal module is an important part of an advanced or intermediate home automation system. With it you can control things that don’t have built-in X10 capability.

Let’s cut right to the bottom line: the universal module is a relay switch that you control with X10 commands. If there’s something you want to automate and it has a switch you can replace or bypass, the universal module, shown in Figure 1-11, is just what you’re looking for. Plug this module into the wall and connect wires from its terminals to the device you want to control, and you’re pretty much all set.

A universal module

Figure 1-11. A universal module

A common use of the universal module is to control a garage door [Hack #56] . In this case, the module becomes a second switch, acting in parallel to the push button you use to manually open and close the door.


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