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flip flop simulation with momentary switch

Hello to all,
 
I wanted to try this circuit with multisim, but I can't simulate the alternate lighting of the LED  with a momentary switch. 
What 's wrong in my design?. I am using the interactive simulation and I click on the switch to see if anything changes.
The LEDs are both on at the simulation start while I was expecting only one turning as in real.
 
I get this circuit from this youtube video https://www.youtube.com/watch?v=IykOrxVcdyg.

I attach a screenshot about the circuit and the respective design in multisim.
 
Thanks for your attention.
 
Ale.

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Message 1 of 4
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Hello!

 

I don't have multisim and I can't help you on that, anyway I found some information on internet which could help you.

Digital Electronics Basics - Chapter 2: Flip-Flops

http://www.ni.com/example/14494/en/

 

Simple Flip Flop simulation. Blinking LED problem

http://forums.ni.com/t5/Circuit-Design-Suite/Simple-Flip-Flop-simulation-Blinking-LED-problem/m-p/25...

 

 

I hope you can find the solution.

 

Have a nice day!

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Message 2 of 4
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Hello,

Thanks for ask. You propose me others circuit but I would like undestand how multisim have a wrong simulation about my circuit.

How can I do work this circuit with multisim?

 

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Message 3 of 4
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hello guys.

 

I have the original circuit tested - it does not switch with original values of components.

 

both transistors are in linear condition  all the time.

 

what task are trying to accomplish?

 

thanks

 

Michael

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