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Discussion in 'General Electronics Discussion' started by Aashish, Apr 10, 2016.

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  1. Aashish

    Aashish

    6
    0
    Apr 10, 2016
    I needed help to complete this project...the ques being stated as: Design a circuit with minimum price to solve the
    -V0=(V1-V2)/3 + V3/2
     
  2. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009
    you are going to have to give us a lot more info for anyone to help you
     
  3. Aashish

    Aashish

    6
    0
    Apr 10, 2016
    What else would you like to know??
     
  4. CapSteel

    CapSteel

    13
    2
    Mar 7, 2016
    You might try rearranging your equation into something different:
    V0 = -(1/6) (2V1 - 2V2 + 3V3).
    You could build this circuit with opamps and resistors, but not sure if it meets your minimum price requirement.
     
  5. Aashish

    Aashish

    6
    0
    Apr 10, 2016
    Could you please help with the circuit design?
     
  6. CapSteel

    CapSteel

    13
    2
    Mar 7, 2016
    Again, I'm not sure if there's a simpler way, but here goes:
    See attached schematic.

    -V0=(V1-V2)/3 + V3/2

    Rearrange equation to get:

    V0 = -(1/6)(2V1 - 2V2 + 3V3)

    Opamps U1, U2, and U3 will output 2V1, 2V2, and 3V3.

    Opamp U4 outputs -2V2.

    Opamp U5 along with resistors R9, R10, R11, R12, and R13 are a summing amplifer which outputs the sum 2V1-2V2 +3V3.

    Opamp U6 multiplies by -(1/6).

    [​IMG]
     
  7. Aashish

    Aashish

    6
    0
    Apr 10, 2016
    Thanks a lot. Will seek the teachers view if this is the output he wants. Anyways you helped a lot .☺☺
     
  8. Aashish

    Aashish

    6
    0
    Apr 10, 2016
    Need some more help for the project... The question being stated as:
    Designa an analog computer circuit to solve the differential equation

    d2y/dt2 + 6 dy/dt = f(t)

    Where f(t) is a square wave signal.
     
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