simulation software

[vinod chandran]

Hi all,
I need a circuit simulation software. i tried spice+ but i don't think it is good for a newbie.I only want the software to show the result of the circuit. for example, i draw a 9v baatery and connect it to 1k resistor. and what will be the result?. Anyway spice+ shows me this result- circuit is attached here
Flags: real
No. Variables: 3
No. Points: 1
Command: version 5.0.2
Variables:
0 V(1) voltage
1 V(1001) voltage
2 v.b1#branch current B1
Values:
0 8.999991000009000e+00
9.000000000000000e+00
-8.999990999654983e-03

somebody plz help me to understand this.
-vinod

 

[Harald Kapp]

Hi vinod,
I don't know spice+. I guess your output is indicating -8.99999...mA through the resistor (which is o.k., given that I=U/R and some rounding error).

You might have a look at LTSPICE (http://www.linear.com/designtools/software/#LTspice). This is a free Spice version with a newbie-friendly graphical user interface. Only limitation: the library of supplied components is rather small. But for the beginning there are the most often requirement components availabe. Also, as you advance in using LTSPICE aou can add any component if you have a SPICE model for it. Many manufacturers supply SPICE models of their components on the internet. There is also an actice LTSPICE users group on http://tech.groups.yahoo.com/group/LTspice/

Regards,
Harald

 

[BobK]

What Harald said. LTSPICE is a great product and is free. It has the easiest schematic capture I have ever used, and nice graphics for the simulation output. I use it for all my analog simulation.

Bob

 

[kcvinu]

Hi Harald Kapp and BobK,
Thanks for the replys. Let me try the LTspice.
-vinod