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What is the problem on this circuit?

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Mrkilic27

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I need to create a square wave from this circuit on Pspice but I couldn't come through.. What is the problem on this circuit? What should I do ?

Thanks for answers..

Circuit: https://i54.tinypic.com/2zyeiyq.png
 

No power supplies connected?
 

I do not know where will I connect the power supply? I am new in this circuits :(
 

Output of OpAmp connected to GND??? Are you sure you want this?
 

The oscillator will need a bipolar power supply (+/- 5 to +/- 15 V). Just place two VDC parts, preferably with correct polarity. And don't short the OP output.
 
Thanks for answers,

Dear FvM,

Can you show me on circuit please? =(

---------- Post added at 10:27 ---------- Previous post was at 10:07 ----------

I did something but I couldnt find a square wave ? How can I find it?

https://i51.tinypic.com/ae0j2d.png --> I found this.
 

I didn't want to claim clairvoyant skills, but it's said "preferably with correct polarity"

The pin designator V+ means, a positive voltage will expected....
 

I didn't understand What you mean? To obtain square wave ,what should I do ?
 

voltage source at the top should be reversed, (-) side sonnected to GND, (+) side to V+ of the opamp (pin4 in cct).
 
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    FvM

    FvM

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just a junction dot at the intersection of the "crossed" wires
 

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