Electronic Circuit Simulator in the Browser • Hacker News Board

Re: Electronic Circuit Simulator in the Browser

#71

Post by Taniwha » Wed, Jul 25, 2018, 10:11 PM UTC

santix wrote: post #23

Nice site! That example circuit is called a resonant circuit and the oscillation that is seen after the power supply is removed happens because both the capacitor (C) and the inductor (or coil, L) store energy—in electric and magnetic fields, respectively—and start feeding each other.

FYI try this:

set the 100 ohm resistor to 1 ohm

set the 15uF cap to 15pF

close the switch, open it again - check out the spark (or rather the stupidly high voltage)

Re: Electronic Circuit Simulator in the Browser

#72

Post by samkalite » Wed, Jul 25, 2018, 10:16 PM UTC

compumike wrote: post #18

Hupriene wrote: post #5

I used and enjoyed circuitlab.io until it went for-pay only. Nice to have an easy to use free alternative for very casual hobbyists like me.

That would be https://www.circuitlab.com/ -- I built it :) Edit: if anyone wants, reply with your CircuitLab username and I'll give you a free membership upgrade when I get home this evening.

Username: k_samson Thanks. Great job!

Re: Electronic Circuit Simulator in the Browser

#73

Post by agumonkey » Wed, Jul 25, 2018, 10:19 PM UTC

on the topic of circuit analysis, read about https://en.wikipedia.org/wiki/Nodal_analysis and https://en.wikipedia.org/wiki/Topology_(electrical_circuits)

lots of interesting bits

Re: Electronic Circuit Simulator in the Browser

#74

Post by zokier » Wed, Jul 25, 2018, 10:19 PM UTC

sleavey wrote: post #40

I'll throw my hat into the ring as well. I have also recently been building a small signal AC analysis circuit simulator [1]. The main idea behind it is to convert a closed source tool that has been around for years within the LIGO scientific collaboration to one that is open source and implemented in Python. It's almost functionally complete, can simulate transfer functions and (accurate) noise from op-amps, resisto…

Is there some fundamental differences between this and the more established simulators like (ng)spice and QUCS? Trying to understand the rationale of building your own

Re: Electronic Circuit Simulator in the Browser

#75

Post by yuhe00 » Wed, Jul 25, 2018, 10:22 PM UTC

compumike wrote: post #18

Hupriene wrote: post #5

I used and enjoyed circuitlab.io until it went for-pay only. Nice to have an easy to use free alternative for very casual hobbyists like me.

That would be https://www.circuitlab.com/ -- I built it :) Edit: if anyone wants, reply with your CircuitLab username and I'll give you a free membership upgrade when I get home this evening.

Username: yuhe

Thanks, that's very generous! I registered a while ago and I'd definitely pay for something like this if I was using it professionally, but I'm barely a hobbyist...

Re: Electronic Circuit Simulator in the Browser

#76

Post by kburkitt » Wed, Jul 25, 2018, 10:32 PM UTC

compumike wrote: post #18

Hupriene wrote: post #5

I used and enjoyed circuitlab.io until it went for-pay only. Nice to have an easy to use free alternative for very casual hobbyists like me.

That would be https://www.circuitlab.com/ -- I built it :) Edit: if anyone wants, reply with your CircuitLab username and I'll give you a free membership upgrade when I get home this evening.

Awesome - thanks!

Username: kburkitt

Re: Electronic Circuit Simulator in the Browser

#77

Post by coupdejarnac » Wed, Jul 25, 2018, 10:35 PM UTC

compumike wrote: post #18

Hupriene wrote: post #5

I used and enjoyed circuitlab.io until it went for-pay only. Nice to have an easy to use free alternative for very casual hobbyists like me.

That would be https://www.circuitlab.com/ -- I built it :) Edit: if anyone wants, reply with your CircuitLab username and I'll give you a free membership upgrade when I get home this evening.

username: bxtel

Thanks! Looking forward to using this!

Re: Electronic Circuit Simulator in the Browser

#78

Post by alphabetter » Wed, Jul 25, 2018, 10:39 PM UTC

Paul Falstad did (and does) all the heavy lifting for this project, but the co-host of the JS version at lushprojects.com is my site and I did the original port from a Java applet to a GWT application that complies to JS.

Glad to know so many people find it useful. I always thought it was a great visualisation tool which I why I wanted to put the effort in to do the port.

Off to bed now, but if people have questions I'll take a look at the discussion again in the morning.

Re: Electronic Circuit Simulator in the Browser

#79

Post by newman8r » Wed, Jul 25, 2018, 10:39 PM UTC

raziel2701 wrote: post #51

Is there a way to use this without an internet connection?

Yes, you can install the java version on your local machine. http://www.falstad.com/circuit-java/

I've done this in the past and it works just fine.

Re: Electronic Circuit Simulator in the Browser

#80

Post by ladberg » Wed, Jul 25, 2018, 10:50 PM UTC

I have 8 bookmarks in my browser and this has been one of them for the past two years. It's incredibly useful for EE stuff and fun to just mess around in.