wein bridge oscillator

Discussion in 'The Projects Forum' started by firecrac, Dec 5, 2006.

  1. firecrac

    Thread Starter New Member

    Sep 19, 2006
    4
    0
    i'm new to electronics, but then i'm assigned to make a sine wave oscillator with wein bridge and AGC, i wonder will this circuit i found on net works?

    [​IMG]

    and 1 thing, can i replace the common 741 op-amp instead of using the surface mounting 7141 op-amps, ur feedback are most welcome :)

    if can recommend some op-amp that is DIP~
     
  2. dragan733

    Senior Member

    Dec 12, 2004
    152
    0
    The picture is too small.

    Yes, about the replacement of 741 with smd 741.
     
  3. firecrac

    Thread Starter New Member

    Sep 19, 2006
    4
    0
    the chip inside the circuit is using 7141
    u sure can be replace with 741?
     
  4. beck

    Member

    Nov 27, 2006
    26
    0
  5. firecrac

    Thread Starter New Member

    Sep 19, 2006
    4
    0
    wow.. thanks much for the feedback..
    i have hard time reading data sheet :confused:
    really shitz~~
    but anyway.. thx much :D
     
  6. firecrac

    Thread Starter New Member

    Sep 19, 2006
    4
    0
    and the bulb, it's not common over my country too, if lets say, i get a 12v 10w bulb,
    can it work ?
     
  7. beck

    Member

    Nov 27, 2006
    26
    0
    That bulb is the stabilizing bulb, it can be replaced with a thermistor with a NTC(Negative temperature coefficient).
    go ahead and replace the bulb with the 12v one and see what happens. if there is distortion in the output, then you may need to change some values in your circuit.
     
  8. dragan733

    Senior Member

    Dec 12, 2004
    152
    0

    Read all characters on the chip 7141. Maybe this 7141 is not OPamp. For example 741 in SMD has a designation: 741CD
     
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