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volt transformer Radio Shack Bridge

Found at: 0x1bi.net:70/textfiles/file?hamradio/powersup.ham

                   BUILDING A 12 VOLT POWER SUPPLY 

Components:
----------

T1    18 volt @ 2 amp. transformer    (Radio Shack # 273-1515)
BR1   Bridge rectifier, 4 Amp. @ 50 PIV (Radio Shack # 276-1146)
C1    4700 F  @ 35 v. electrolytic capacitor   (Radio Shack # 272-1022)
C2    1000 F  @ 25 v. electrolytic capacitor   (Radio Shack # 272-1019)
C3    .1 F @ 25 v. disc ceramic capacitor      (Radio Shack # 272-135)
Jacks and connectors
Enclosure

Ŀ          
                       7812 12-volt VOLTAGE REGULATOR
Ŀ    
     Ŀ
            

          
   7812                 front view
          
                       Pin 1 = input
              Pin 3 = ground
                   Pin 2 = output
     
     
     
     
  1   3   2 

 
 

Ŀ
     FULL WAVE     
 Bridge Rectifier     BR1
                   
+       AC        -

                
                
                
                
                

 







     sw  fuse  T1                       
AC __/ıĿ    ac         +         1Ŀ2
             )(Ĵ 7812 +12v out
---  mov   )( rectifier   +      3       +    +
      )(              C1             C2    C3
             )(    BR1                               
AC __/)(Ĵ-                           
    sw            ac         Ŀ
                                                                   gnd
                                                                   


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