Are there similar solutions without 3d view? I want to get a simulator that can show me what is going in the circuit, ideally slowed down a lot. For example I was making a dongle with resistor and capacitor which was delivering a pulse-short (i.e. removing power for a short period of time instead of delivering an impulse) and while I was able to confirm overall idea with some online simulator, dialing in capacitance and resistance required physically switching components. Ideally I want to be able simulate such transient effects and arrive at specific numbers ready to be soldered.
And I want it to be free/open-sourse ideally :)
Sounds like you are looking for a SPICE like simulator, there are quite a few free/open:
https://en.wikipedia.org/wiki/List_of_free_electronics_circu...
orcad is the commercial classic for doing schematics with a spice backend. (spice is an oss engine out of berkeley for simulating circuits on computers. for dc it just solves the classic nodal analysis and for ac you can feed in things from a fantasy signal generator and capture things at various nodes in the circuit) there's also some pretty cool looking commercial web thing now that also will maintain netlists with real-time prices and will let you swap parts out and set minimum quantities etc.
kicad is the oss orcad, but i never got good at it. (to be fair, orcad was weird to learn as well)
I think altium has taken over as the top tier commercial offering in this space.
I always disliked Orcad. Especially because cadence had excellent software that predated OrCAD, and for reasons that I cannot fathom chose to promote OrCAD after they acquired it instead of the better software.
Here's a specific example in the interface. If you wanted to draw a wire, the keyboard shortcut of the old software was 'w' but orcad required you to type 'ctrl + w'. Why are you forcing me to use control when w doesn't do anything on its own? It was filled with similar tiny annoyances that just slowed things down. (Admittedly, it's been years since that was my primary work, and free stuff is good enough for what I do now.) I sincerely hope that orcad has continued to improve over the years.
Altium has taken over a lot of small to medium sized shops. Mostly because the price is right for its capability. It also has a history of being the least bad compromise between the odd mixtures of excellence and user-hostility Cadence and Mentor tend to come up with, going back to the Protel days, and they've done a good job in the last decade+ of marketing it to those shops. Cadence and Siemens nee Mentor (and maybe Zuken? I've never seen Zuken in the wild, but it always makes these lists) have been neglecting the entry level and smaller organizations and aggressively trying to move their customers to their higher tier offerings during that time. But while it's Altium's flagship product, it is not top tier. It is really entry-level for a professional PCB-level design package, like PADS and OrCAD as opposed to Xpedition and Allegro.
Some people like Everycircuit and Falstad for that.
Not foss but tinkercad circuits (https://www.tinkercad.com/circuits) comes to mind.
Ltspice. Ng-spice