Comments on: An LTSpice Tutorial

By: arti dwivedi

arti dwivedi — Wed, 05 May 2010 08:07:42 +0000

sir i like this software
but i wants to see phase portrait between voltage across two capacitor so which edit simulation we will use

By: gino vanilla

gino vanilla — Wed, 23 Dec 2009 08:49:26 +0000

once you used the first time you’ll never go back to another else spice program:

+ 100% pure freeware
+ incredible powerful and easy rather than p$pisce
+ zero limitation

-ugly cad [but for this exists better alternative such as mdraw]

By: fahad

fahad — Thu, 09 Apr 2009 17:23:13 +0000

very nice

but what about relay device where to find it in the library?

By: Luke

Luke — Mon, 07 Jul 2008 16:36:15 +0000

I just installed LTSpice and was wondering how to use this program with three-phase circuits.

By: gaussmarkov

gaussmarkov — Thu, 24 Apr 2008 16:43:43 +0000

I run the program from a shortcut to scad3.exe created by the installation. I have never seen your problem. I’m sorry that I cannot be more helpful.

Have you tried looking for help at the LTSpice users group on yahoo?

By: Troubled

Troubled — Thu, 24 Apr 2008 15:22:54 +0000

How do you run the program? I recently downloaded and installed it. At the end of the installation, an icon name “scad3.exe” appeared. But on clicking it, it generated an error–not win32 executable file.

help!

By: gaussmarkov

gaussmarkov — Tue, 08 Apr 2008 04:33:33 +0000

Thanks, Ron! That’s a helpful post.

By: Ron Fredericks

Ron Fredericks — Sun, 06 Apr 2008 18:25:55 +0000

Nice intro to LTspice/Switcher CAD III.

I share my experience as a first time user building a 555 CMOS timer circuit in a blog post too. Perhaps your readers will be interested. Here is the link: embeddedcomponents.com

By: resistance

resistance — Sat, 22 Mar 2008 14:17:49 +0000

Thanks for your reply, paul.

This is the spice netlist for the circuit i want to find the equivalent resitance for.

* C:\Program Files\LTC\SwCADIII\Draft1.asc
R1 0 N003 1
R2 N001 N002 1
R3 N002 0 1
R4 N003 0 1
R5 N002 N003 1
V1 0 N001 1
.op
.backanno
.end

Hope you can help me check out the value for the resistance.

By: gaussmarkov

gaussmarkov — Fri, 21 Mar 2008 18:21:05 +0000

hi,

there are 2 nodes (or nets) in this circuit, one connected to ground and the other to the positive terminal of the voltage source and one lead of the resistor. LTSpice creates internal labels for nodes other than ground (or the one you label yourself). “n001″ is the generated label for the ungrounded node. “V(n001)” is the voltage for that node.

to compute the Thévenin equivalent resistance between two points in LTSpice, (1) measure the voltage when the points are not connected and (2) measure the current when the points are connected. the Thévenin equivalent resistance is the ratio of the voltage over the current.

hope this helps, paul