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== RF ICs/Modules ==
 
== RF ICs/Modules ==
 
Many open-source [[radio communication]] systems use an RF IC.
 
  
 
RF modules allow transmission and reception of digital signals over radio.  The two most common types are AM and FM( FSK ).  The three major frequency bands used by unlicensed devices are 433MHz, 900MHz, and 2.4GHz.  433MHz has very limited uses by the FCC and is mostly used by garage door openers and wireless key entry systems.  Many newer devices are moving to 2.4GHz due to the greater amount of room, althrough 2.4GHz is harder to use and has less range then the same power 900MHz system.
 
RF modules allow transmission and reception of digital signals over radio.  The two most common types are AM and FM( FSK ).  The three major frequency bands used by unlicensed devices are 433MHz, 900MHz, and 2.4GHz.  433MHz has very limited uses by the FCC and is mostly used by garage door openers and wireless key entry systems.  Many newer devices are moving to 2.4GHz due to the greater amount of room, althrough 2.4GHz is harder to use and has less range then the same power 900MHz system.

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