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Problem with SR Flip Flop
Respected Sir,

I am currently running the software FREE-EDA on my Windows - 7 computer.

I am trying to create a circuit consisting of an SR Flip Flop. Hence, I selected the Component labelled as ' D_SRFF '. I am unable to understand the connection to be made to the ' set ' and ' reset ' pins present on the component. ( Note - I am referring to the <span style="line-height: 21.4285717010498px;">' set ' and ' reset ' pins present on the bottom of the component as circled in the image below. ).

</span><img align="none" alt="" src=""><span style="line-height: 21.4285717010498px;">


Oscad Schematic-Creation-and-Simulation 00-01 min 0-10 sec 21-06-15, 12:26 a.m. skhilav



Set and Reset pin is used make flipflop output high or low respectively. You can assign 5V dc or 0v as per your requirement and you can also used No Connect to this pins which is available in Kicad. Hope your doubt has clear..
21-06-15, 11:01 a.m. Gaurav_Supal

Respected Sir,

As suggested I tried making the circuit again. This time I used a no-connect pin with the set and reset pins. But still could not get the graph.
Please guide me for the same once again.
<span style="line-height: 21.4285717010498px;">The error that I am receiving is "Fatal Error in Ngspice"</span>

Below is the image of the circuit. Kindly let me know if there is something wrong with the circuit.
<img align="none" alt="" src="">

21-06-15, 9:03 p.m. skhilav

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