hi every one can some one

[BILAL sadiq]

hi every one can some one help me please
i do not know how to connect 12V supply for my dc motor with 5v microcontroller 8051 ,,,i mean to say in hardware what should i do ???? should i use LM7812 or how ,,,,,please do help me ,,,,,what and how i manage to run a 12V dc motor with 8051 microcontroller,,,i know the theory(about L293D) but on hardware how can i get 12 V ???
please help me and especially guide me please 
waiting for nice advices and help …
thanks