Fergana branch of tashken university of information technologies named after al

B   control devices and networking 
Intelligent  homes  are  controlled  with  different  types  of  interfaces,  devices  that  facilitate 
communication  between  the  user  and  the  system:  physical  switches,  touch  screens,  IR  (infrared) 
remote controls, computers either at home or at a distance, telephony. 
 Different  elements  perform one of these two functions: they are  either  command initiators, e.g. a 
brightness  sensor  that  is  programmed  to  send  an  instruction  when  it  gets  dark,  or  command 
receivers, e.g. a light that turns on when it receives an instruction sent by the sensor. 
Household  appliances,  sound  and  video  systems,  optical  and  thermal  sensors,  etc.  can  be  linked 
with  wired  and  wireless  systems.  Wired  LANs  use  different  types  of  cables  and  also  electrical 
wiring. 
WLANs,  wireless  networks,  use  radio-frequency  systems:  Bluetooth,  a  short-range  radio  system 
used  to  communicate  between  portable  devices  (laptops,  PDAs,  mobile  phones,  etc.),  is  now 
frequency used to design PANs (personal area networks) inside the home.