Electronics > Beginners
Free circuit simulator ?
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vk6zgo:
As an old fart, what annoys me is that people constantly draw schematics with LTspice that do not follow the conventions of normally drawn ones.

Inputs on the right side, top, or bottom, bits of circuitry hanging out like barnacles.
OK, that's really the fault of the user, but other things like showing ac sources as DC generators with "ac" written on them are just plain dumb!

Little "noobs" keep coming up with silly circuits which won't work in the real world, (things like Op Amps with resonant LC networks in their feedback loop), & LTspice will either work, or will not give any clue as to what the user has done wrong, so they come on here, expecting us to sort it out for them.

I thought, "Maybe I'm a nasty old turd, & I'm unfair to LTspice", so I decided to download it & just try some simple circuits.
It was just as clunky as I had suspected--- took ages to work out how to draw the simplest schematic, & don't get me started on running tests!
If they went out of their way to put obstacles in the way, they couldn't have done better.!

If I can build the real thing & test it in less time, I'd say that is a fail for a simulator.

And as I've said before----"Get off my lawn!"( I'm thinking of making that my signature!) ;D
TheNewLab:

--- Quote from: vk6zgo on April 01, 2019, 12:36:09 am ---I thought, "Maybe I'm a nasty old turd, & I'm unfair to LTspice", so I decided to download it & just try some simple circuits.
It was just as clunky as I had suspected--- took ages to work out how to draw the simplest schematic, & don't get me started on running tests!
If they went out of their way to put obstacles in the way, they couldn't have done better.!

And as I've said before----"Get off my lawn!"( I'm thinking of making that my signature!) ;D

--- End quote ---

So what what circuit simulator do you like?  I am only a hobbyist.


 Played a little bit around with LTSpice because a saw Afrotechmods teach three episodes on it.. yes, these do have a bit of a  learning curve. However, I am starting simple. in time become more proficient from using it.

I have come to like KiCAD. SO many YTs on KiCAD. I can do a search and quickly come up with a solution
 how about Dip Trace?



Now I'm learning the KiCAD most recent version..using .Linux

and


Both are free. both have ability to download and add extra libraries... for me as a hobbyist, I have no desire to pay for an app. That said, I am curious what your preferred circuit simulator is

 Addicted and too curious in this hobby.
Wimberleytech:

--- Quote from: vk6zgo on April 01, 2019, 12:36:09 am ---As an old fart, what annoys me is that people constantly draw schematics with LTspice that do not follow the conventions of normally drawn ones.

--- End quote ---

Until now, I did not believe in reincarnation.

You are Bob Pease!

LTSpice is great!
DimitriP:

--- Quote ---As an old fart, what annoys me is that people constantly draw schematics with LTspice that do not follow the conventions of normally drawn ones.
--- End quote ---

That's like blaming the pen for spelling mistakes or spoons for obecity or guns for deaths.

....and if you started correcting every violated schematic convention, every thread would have 10 extra pages added to it and worse, most of it would be people calling you names for not being welcoming and helpful :) 




Zero999:

--- Quote from: vk6zgo on April 01, 2019, 12:36:09 am ---As an old fart, what annoys me is that people constantly draw schematics with LTspice that do not follow the conventions of normally drawn ones.

Inputs on the right side, top, or bottom, bits of circuitry hanging out like barnacles.
OK, that's really the fault of the user, but other things like showing ac sources as DC generators with "ac" written on them are just plain dumb!
--- End quote ---
Yes, but it's possible to draw decent schematics using LTSpice. I like to think I do a reasonable job, even though it's not every schematic I do is perfect.


--- Quote ---Little "noobs" keep coming up with silly circuits which won't work in the real world, (things like Op Amps with resonant LC networks in their feedback loop), & LTspice will either work, or will not give any clue as to what the user has done wrong, so they come on here, expecting us to sort it out for them.
--- End quote ---
Yes, been there and done that, but they'll soon find out.


--- Quote ---I thought, "Maybe I'm a nasty old turd, & I'm unfair to LTspice", so I decided to download it & just try some simple circuits.
It was just as clunky as I had suspected--- took ages to work out how to draw the simplest schematic, & don't get me started on running tests!
If they went out of their way to put obstacles in the way, they couldn't have done better.!

If I can build the real thing & test it in less time, I'd say that is a fail for a simulator.

--- End quote ---
Well duh, it takes time to learn anything new. It probably would've been the same for me the first time I used LTSpice, if it wasn't for the fact I did so to simulate and modify someone else's schematic.

It does amuse me when old gits moan about how crappy simulation is, yet if it didn't exist, then they wouldn't be using the Internet and have access to the great variety of modern ICs. SPICE was instrumental in the development of more powerful computers and analogue ICs. It's just not possible to build an IC to test a circuit idea, hence the need for simulation!


--- Quote ---And as I've said before----"Get off my lawn!"( I'm thinking of making that my signature!) ;D
--- End quote ---
Where the heck does that come from? Is it a reference to one of Dave's videos, which I've missed, as I don't watch much EEVblog?
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