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Electronic Siren problem

Discussion in 'General Electronics Discussion' started by jepoy12, Oct 7, 2011.

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  1. jepoy12

    jepoy12

    20
    0
    Aug 19, 2011
    Hi everyone.
    Can you help me figure out whats wrong with this circuit?
    I tried making it on my breadboard but its not working.
    [​IMG]

    need your help guys.
    thanks!
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,412
    2,780
    Jan 21, 2010
    Chances are that it's not the circuit, it's your construction that's at fault.

    What faults are you seeing?

    Is anything getting hot?

    How much current is drawn before you press the button, and then while you press it?

    Do you have some clear photos of your breadboarded circuit?
     
  3. shrtrnd

    shrtrnd

    3,763
    485
    Jan 15, 2010
    Odds are that *steve* is right.
    When rechecking your wiring, do not assume simple connections are correct.
    Carefully recheck every connection.
    If you still can't find a problem, recheck your pin-outs on the transistor to make
    sure it's installed correctly. Also the LM324.
    If you think everything is right, you may have blown the transistor or IC, and they
    need to be replaced.
     
  4. jepoy12

    jepoy12

    20
    0
    Aug 19, 2011
    btw instead of using the LM324 I change it to lm741 and I use two of it.
     

    Attached Files:

  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Great, so you have it working then?

    I'll close the thread.

    Congratulations.
     
  6. jepoy12

    jepoy12

    20
    0
    Aug 19, 2011
    No its not working. I dont know why? I already check my wirings and all are correct.
     
  7. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    Have you checked to make sure your lm741 swap out was a direct and exact replacement for the lm324 without modification to the circuit?

    I would also like to see a picture of your breadboard layout.
     
  8. jepoy12

    jepoy12

    20
    0
    Aug 19, 2011
    its exactly the same as this pic. I already check it like 10x and I'm really sure that all the pins are on correct connection. [​IMG]
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,412
    2,780
    Jan 21, 2010
    Let me tell you something for free. It doesn't matter how many times you look at a circuit, you still may overlook something obvious to someone else.

    We only have so much time and so much patience.

    I asked you a number of questions that you didn't bother answering, and thus the only information we have is the rather useless "it doesn't work".

    If you can't give us any more information, then we can't give you any answers.

    Oh, and telling us where you found the circuit would help too.

    In summary (and I'm not going to spend any more time on this issue until you can supply most or all of this):

    1) What faults are you seeing?

    2) Is anything getting hot?

    3) How much current is drawn before you press the button, and then while you press it?

    4) Do you have some clear photos of your breadboarded circuit?

    5) Where did you find this circuit?
     
  10. jepoy12

    jepoy12

    20
    0
    Aug 19, 2011
    I already solved the problem. thanks for all the help guys
     
  11. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,412
    2,780
    Jan 21, 2010
    Can you let us know what the problem was?

    How well does the circuit perform?

    Perhaps someone in search of a siren will find this thread and you can help them.
     
  12. KJ6EAD

    KJ6EAD

    1,114
    157
    Aug 13, 2011
    He probably had a diode or capacitor in backward and is too embarassed to admit it. :p
     
  13. davelectronic

    davelectronic

    1,087
    12
    Dec 13, 2010
    Siren circuit

    Bit harsh guys, although a description on the finished result would have been nice, as you say others could have learned from it. And its all to easy to make circuit mistakes, result often wrecked components, but yes unless the description of the problem is accurate, or pic's and update of current progress is given i guess it makes any would be help limited or not possible.
    Dave.
     
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