| This is extraordinarily cool [message #1492] |
Sun, 24 April 2005 08:53  |
wunhuanglo
Messages: 912
Registered: May 2009
|
Illuminati (2nd Degree) |
|
|
|
This a link to the free student version of CircuitMaker. I guess it's graphical Spice. I have essentially no idea of what I'm doing, but with a little fumbling I made a first-order 2-way crossover with a 2.82V p-p sine wave input and variable frequency. When you get it "right" you get an oscilloscope window, and you can move a voltage probe around the circuit to see amplitudes. Varying the frequency you can see the effect of larger caps or smaller inductors etc... You can learn a lot with this thing.
|
|
|
|
| Re: This is extraordinarily cool [message #1493 is a reply to message #1492] |
Sun, 24 April 2005 12:43  |
Damir
Messages: 1005
Registered: May 2009
|
Illuminati (2nd Degree) |
|
|
Although PSpice ("OrCad"-for example) is almost "standard", I like "Circuit Maker" (3f4/3f5 "spice engine") better and used it every day in the last few years. Although not without its imperfections (transformer models, some "too simple" models, etc.) it`s easy to use and understand. It has some tube models, and other can be found on the net ("Duncan amp pages" - models, links, explanations, list of other free "Spice" programs...).
Great tool for learning - you have virtual multimeter, oscilloscope, bode plot (frequency AC analysis), Fourier-analysis, etc., and you can see "what`s goin` on" in every part of the circuit. Of course, your analysis is that good like the models, but I found that even the simplest triode models, based on the expression:
Ia=K(ยต*Ugk+Uak)^1,5 are "good enough" for DC and some AC "results". Of course, you can`t expect accurate results for distortion analysis ("optimistic" results, because of "more ideal" Ua/Ia/Ug "lines").
All in all, great - and free .gif) program...
|
|
|
|
|
|
|
|
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
