TAILIEUCHUNG - Apress - Smart Home Automation with Linux (2010)- P27

Apress - Smart Home Automation with Linux (2010)- P27:Linux users can now control their homes remotely! Are you a Linux user who has ever wanted to turn on the lights in your house, or open and close the curtains, while away on holiday? Want to be able to play the same music in every room, controlled from your laptop or mobile phone? Do you want to do these things without an expensive off-the-shelf kit | CHAPTER 3 MEDIA SYSTEMS If you are wanting to distribute high-definition images around your house then you currently have to consider the more expensive options such as matrix switchers because the current crop is focused around RCA sockets. Switching The cheapest piece of necessary equipment is an AV switch box or AV source selector box. This provides multiple inputs for your various devices DVD PVR VCR and so on and routes one of these to the TV output. Most equipment give you the option of using either S-Video RCA or SCART inputs. This naturally requires that the TV is always set to receive the input from the box not its internal tuner. There are many switch boxes available so the features to consider are as follows. Infrared remote control This is a necessity really. Since this box is now taking the place of your TV channel changer it must have the functionality you d expect from the at a bare minimum is a remote control. Active or passive devices Active units have a small amplifier in them and therefore need power. These ensure a strong signal but at the expense of a lower quality on the cheaper models since their internal amplifier isn t as good as the ones on the DVD player or on a TV. Passive devices have no such amplification and are more likely to lack an IR remote. Input connections Although some boxes provide S-Video RCA and SCART for each input they might not be interconnected. That is the RCA input socket might only be connected to the RCA output socket and not to the S-Video or SCART. Since you only have one output to the TV this requires you to compensate for adapting your interconnects to the most common form factor and to convert every other input into the same type of plug there are converters available in most electronic shops . You then use the equivalent output. This part of the specification isn t usually well documented so check the shops return policy first. Number of inputs Count the devices you have add to this the number of .

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