micro controllers

Is it possible to use micro controllers to make transmeters/receivers, or other devices as power supplies(possible to generat different level of voltages).

Could you please supply me some articles to folow up some basic ideas and design procedures for such devices.

Many thanks,


Mahinda
 

What kind of transmitters/recievers?
RS232 transmitters/receivers, IR? radio signals? ...

some things can be done with the help of a pic, others not
 
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