problem with simulation in proteus

Discussion in 'General Electronics Chat' started by spidermanIIII, Oct 25, 2014.

  1. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    i build attached circuit but the lamb didn't work what is the reason
     
  2. MrCarlos

    Active Member

    Jan 2, 2010
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    Hello spidermanIIII

    Physically, this circuit does not work ??
    Or just in the simulation ??

    If the simulation does NOT work is because you have several things to improve.
    One of these is that no current flows through the Gate of the Triac.
    You missed the red line appearing in the file that you attached. Triac that you placed in your scheme is generic and does not work. I changed Triac By L4004L5.
    In the lamp parameters you assigned a value of 320, but You missed the V.
    should be: 320V.
    You'll notice that the lamp flashes, this is due to the speed of the computer (PC).
    Note also that the gate of the Triac requires a resistor whose value is calculated knowing the electrical characteristics of the Triac which will be using.
    It is convenient to set the parameters of the devices according to what is being done.
    For example, the voltage applied to the lamp is 220V, but you programmed a voltage of 320V.

    In the simulation, give it some time to turn on the lamp

    One last note:
    To develop your design in reality you must be very careful because you might get an electric shock.
    This is because the line that is marked in red.
    To avoid this you should use an Optocoupler to trigger the Triac.

    Anyway, do several tests with the circuit I'll attached.



    .
     
  3. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    0
    dear MrCarlos thank you for trying to help me , i simulate the circuit but the lamp neither work nor flash what is the wrong and if i use Optocoupler can you show me how to put it in the circuit
     
  4. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII

    You Asked:
    If I use Optocoupler can You show Me how to put it in the circuit.

    First of all We have to analyze why the circuit does not work in your simulator.

    Your simulator Proteus ISIS (Version 8) is the DEMO version ??.
    If You have DEMO version, that could be the reason that your circuit does not work.
    The speed of Your PC might be another reason that your circuit does not work.

    But hey: What about the simulation ??
    When running the simulation, what you see on the screen ??.
    When you press the button, can You see the little red boxes, for example, PIN3 In 555 ??

    Telling me: The Lamp neither work nor flash. does not say anything about how to help.
    Give me some inputs. More than four.
     
  5. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    when i press push button the pin3 becomes high and the gate of triac but the lamp doesn't work. there is something i tried which i change the frequency of vsin from 50Hz to another less value and the lamp flashes
     
  6. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII
    By your answer I think is the speed of your PC.
    I have a DELL LAP-TOP with Windows Vista operating system.
    Your circuit works fine on it.
    Unafraid Assemble your circuit with real components, for sure work.
    Keep in mind that the TRIAC should be able to handle the current and voltage of the lamp that uses TO.
    .
     
  7. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    0
    MrCarlos i want to ask you why you connect the traic with the ground (red line)
     
  8. MrCarlos

    Active Member

    Jan 2, 2010
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    134
    Hello spidermanIIII

    Because is the normal Path to the current for the Triac Gate.
    If you remove it no current flows through the Gate of the Triac.

    Are you ready to add an Optocoupler to your design ??
    How would you do it ??

    .
     
  9. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    MrCarlos i have another question about (red line). Is the AC current affect the on the GND of 555 or affect capacitor C3 or C4 can you explain me please
     
  10. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII

    Does not affect any of those things you mention.
    The only one affected is the Gate of the Triac.
    If you disconnect the red wire, the Triac will not work

    ! Warning ! When your circuit is energized you could RECEIVE electric shock if you touch it.
    .
     
  11. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    Does not affect any of those things you mention.
    can you explain more why does not affect
     
  12. MrCarlos

    Active Member

    Jan 2, 2010
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    134
    Hello spidermanIIII

    Really not much to explain.
    I can not find any current flow to affect those components.
    You did?
     
  13. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
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    0
    MrCarlos, can you help me to add Optocoupler to the design
     
  14. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII
    It is relatively easy to do what you intend.
    The optocoupler’s LED will be lit by 555 through its current limiting resistor.

    Optocoupler outputs, which may be a photo Transistor or photo Diac, are connected, also through its resistance, to gate of the TRIAC, the other terminal is connected to the TRIAC-lamp which is currently joint.
     
  15. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    please can you modify it with proteus and upload it
     
  16. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII

    ! Why not make an attempt Yourself ??. . . .!
    It is very easy

    Analyzes What I will attached and please respond.
     
  17. spidermanIIII

    Thread Starter Member

    Nov 22, 2013
    76
    0
    MrCarlos what is forward current and reverse voltage in datasheet
     
  18. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello spidermanIIII

    First of all, sorry for the delay,

    Forward Current: Talking about electronic current,
    It is one of the parameters of the diodes. Normally is specified in three settings: Minimum, Typical and Maximum. (Min. Typ. Max)
    Is the current flowing in a semiconductor when it is polarized in the way (direction) of conduction.
    It is the current that supports the diode without damage.

    Reverse Voltage: The voltage in the opposite direction, which can polarize the diode without damaging.
     
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