Help with Freeze alarm

Discussion in 'Homework Help' started by mrmojorisin, Nov 6, 2008.

  1. mrmojorisin

    Thread Starter New Member

    Nov 6, 2008
    2
    0
    Hi all,
    Newbie in need of some help.
    I have been asked to reproduce a simple thermistor freeze alarm circuit in crocadile.
    [​IMG]

    I keep getting an exploding power supply due to to much currency. Please help? Let me know what extra info you need from me.

    [​IMG]
     
    Last edited by a moderator: Nov 6, 2008
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Your circuit is incomplete. The active device is not identified and needs both inputs connected. The diode associated with the transistor will block current.

    Have you identified what is drawing too much current?
     
  3. mrmojorisin

    Thread Starter New Member

    Nov 6, 2008
    2
    0
    Thanks for your reply!
    I have completed the circuit but do i need to remove the diode?
    I cant be sure what is drawing all that current.
    [​IMG][​IMG]
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Where is the power supply of the op-amp?
     
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