First this post will probably get more input if you get it moved to the sandbox.
Second what is your desire or intent? Simulation, Schematic, Board layout? Free programs exist for the last two (Eagle from CadSoft, ExpressPCB's software, etc), but quality simulation systems cost money (cheaper if your a student). ExpressPCB's software is designed for thier own production service, Eagle outputs into many different formats (including the industry standard OrCAD and Gerber formats)
LTSpice, available free from http://www.linear.com/company/software.jsp , is an industrial strength simulator.
Linear Technology publish it for free, since it lets them get their IC models used in designs - but it's also what they use in-house for silicon and board designs, apparently.
Its digital simulation isn't particularly refined, certainly not compared to some of the educationally biased simulators (but the analogue simulator is second to none). The built-in help and example files answer most questions (that I've had, anyway [noparse]:)[/noparse]
It's got a good support mailing list, but it's not ideal for complete novices, since it's support for the program, rather than for analogue design questions.
I've got no connection, I just use it from time to time. (and yes, it does occasionally get me to specify LTC parts, so I guess it's doing its job)
Great Thanks, As far a application I am building a machine with solinoids and controlling with bs2p
I have program to control on off sequence· I am looking at solinoids . One set Numatics is 24v 7watts,·Other set is SMC 24volt 170ma·Relay I'm·trying to use is a laa110· I need basic circuitry to accomplish this without burning the Stamp Thanks
Glad to hear a spice variant is still free, I did most simulation in college using the P and H version. PSPICE was easily availible a while back, but they started to concentrate on the commercial version and the free version wasn't as well maintained and was difficult to find.
PSPICE ver. 9.1 is free, available on-line·and works great.· Of course there are limitations (eg 10 transistors, I think) but it still is very helpful and many times quicker than actually building the circuit.· Of course, as with any tool, one needs to have an idea of what it is doing "in the black box" to avoid problems.
Comments
Second what is your desire or intent? Simulation, Schematic, Board layout? Free programs exist for the last two (Eagle from CadSoft, ExpressPCB's software, etc), but quality simulation systems cost money (cheaper if your a student). ExpressPCB's software is designed for thier own production service, Eagle outputs into many different formats (including the industry standard OrCAD and Gerber formats)
LTSpice, available free from http://www.linear.com/company/software.jsp , is an industrial strength simulator.
Linear Technology publish it for free, since it lets them get their IC models used in designs - but it's also what they use in-house for silicon and board designs, apparently.
Its digital simulation isn't particularly refined, certainly not compared to some of the educationally biased simulators (but the analogue simulator is second to none). The built-in help and example files answer most questions (that I've had, anyway [noparse]:)[/noparse]
It's got a good support mailing list, but it's not ideal for complete novices, since it's support for the program, rather than for analogue design questions.
I've got no connection, I just use it from time to time. (and yes, it does occasionally get me to specify LTC parts, so I guess it's doing its job)
Steve
I have program to control on off sequence· I am looking at solinoids . One set Numatics is 24v 7watts,·Other set is SMC 24volt 170ma·Relay I'm·trying to use is a laa110· I need basic circuitry to accomplish this without burning the Stamp Thanks
http://www.clare.com/home/pdfs.nsf/www/Laa110.pdf/$file/Laa110.pdf
Load Voltage 350 V
Load Current 120 mA
Max RON 35 Ω
That's my 2 cents.
Nate
bugg
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Geordi: "It's like the laws of physics went right out the window!"
Q: "And why shouldn't they, there so inconvinent!"
http://www.microcode.com/downloads/student.htm
Mike
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