[sdiy] Love for LTSpice

[sleepy_dog at gmx.de]

There is a spice group at yahoo groups, they have all sorts of models,
including stuff like CA3080 or LM13700.
They may not be super accurate in all regards, though...

https://groups.yahoo.com/neo/groups/LTspice/info


And complex circuits can mean that it takes ages to compute a solution, 
especially if higher frequency stuff is going on.

For some circuits which are supposed to get into oscillation, they will 
do so only when you check the box "start power supply at 0 V" or 
something like that. I have a rough idea why, but maybe somebody here 
can properly explain it. Having this option on by default preeptively is 
not necessarily a good idea, though, since for some circuits it can 
increase the time it takes for the solution to converge immensely, 
without improving anything.

And then, what Nils said. Don't confuse what LTspice shows with reality. 
It doesn't model every aspect. IIRC it doesn't even warn you if you send 
2 amps through a BC547 or something like that.

Steve


Am 26.05.2017 um 20:51 schrieb Tim Ressel:
> You also have to deal with parts not in the library, but there is an 
> active community behind it, ready to help out.
>
> --tim
>
>
> On 5/26/2017 11:30 AM, Eric Brombaugh wrote:
>> Agree!
>>
>> It's amazing what you can get for free. I've made heavy use of 
>> LTSpice for my analog and RF designs as well. The GUI is a bit... 
>> orthogonal compared to what you normally run into so it takes some 
>> getting used to, but the functionality is 100% good.
>>
>> Eric
>>
>> On 05/26/2017 11:18 AM, Tim Ressel wrote:
>>> Hey,
>>>
>>> I just wanted to say what a great tool LTSpice is. It has gotten me to
>>> an answer faster than other methods I have, on several projects. The
>>> latest was a control circuit for a cross fader. The design I found in a
>>> back alley had cooties. LTSpice helped me get to the bottom of the 
>>> problem.
>>>
>>> Thanks Linear Tech!
>>>
>>>
>>
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>