L7805CV 5V Voltage Regulator 1.5A

Discussion in 'General Electronics Chat' started by StealthRT, Aug 9, 2012.

  1. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    I seem to be having some problems with hooking up the L7805CV Regulator. When i provide it 12v @2A i seem to be getting an output value of 10.xxV???

    What could i be doing incorrectly? Does it matter that the power supply is 2A and the Regulator is 1.5A?

    Schematic: http://www.taydaelectronics.com/datasheets/A-179.pdf
    Code ( (Unknown Language)):
    1.  
    2. (TOP VIEW)
    3. --------|====== Output
    4. |       |====== Ground
    5. --------|====== Input
    6.  
    I have my photo below hooked up looking at it from the back.

    [​IMG]

    What would i be doing incorrectly?
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,437
    3,360
    Where is the connection to the input pin?

    Did you install the two capacitors like they asked you to do?
     
  3. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    I was showing the picture just for proof of hooking it up correctly to the input and ground of my power supply. The output pin was bare so that i can use a multimeter to check the current output.

    Its a fixed 5v output i thought? Did not think it needed anything special?
     
  4. StealthRT

    Thread Starter Active Member

    Mar 20, 2009
    223
    0
    Crap.. had it hooked up wordsback... :/
     
  5. MrChips

    Moderator

    Oct 2, 2009
    12,437
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    Are you dyslectic? No offense intended... ) :
     
  6. #12

    Expert

    Nov 30, 2010
    16,269
    6,781
    It still needs the capacitors to stop it from oscillating.
     
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