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     ,       PIC16F84  Microchip (http://www.microchip.com/).     ,   .              . 

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    ().            ,     PIC .
 :

        .30 
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   -      1.   :  

  ,    VT1.   ,    J5, ,      PIC   ; 

  U1,   , , ,        .  J3  J4      .       Y1        C3  C4. 

  U2   . 

 U3     . 

    U4.     8..12     J1(+)  J2(-) 

     : 

   J3  J4    ( ); 

  . 0   J3           ( ); 

  . 0   J4        ( ); 

  . 0    J3  J4  1 .       ,     "F"   . 

  . "0"  J3  J4              .            . 

    ,             PIC .          5.5 . 

.  0   0  (). 

       57  67 .      .2 ,           . 

   -      PIC     .              C3      .        C4.  

   -     PIC     .              C3      .       C4. 

digi.zip  5kb,    
  . 



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