Circuitlab has an online simulator that is easy to use and plenty powerful enough for many guitar effects circuits. I created the LPB1 circuit as shown above, and made it public for you to try out.
There is nothing to download, and the program is very easy to use. Simulations allow you to check the DCbias, the Frequency Response and a Time Domain view (like an o-scope) as shown below.
Check it out at https://www.circuitlab.com/
I personally use ltspice for my circuit simulation and I’ve had somewhat mixed results doing simulations with Sinewaves VS running a wav file through my circuit; I’m not really sure which one I should trust more, sine wave changes or audio changes from a directly recorded guitar track. Any thoughts?
Hey Jack – How can we open your LPB1 example in CircuitLab? Do you have a link to it or something?
It is called LPB1 and you should be able to open it from within CircuitLab since I tagged it as publically available.
-Jack
Pretty cool…. but slow. I ran exact same simple depletion-mode MOSFET amplifier sim in both LTSpice IV (freeware from Linear Technology) and the Circuit Lab sim, took 233.29 seconds in CircuitLab, took… well… no more than 2 seconds in LTSpice IV. Results were close, within 10%. LTSpice lets you directly cut-and-paste the Spice model, wheres in CircuitLab you enter the values for the device. But, all in all, it seems to work just fine, except for speed. I’ll make the design public as LND150_SS_CS_AMP so you folks can check it out. Good luck.
CircuitLab is cool. The interface is nice and clean. I also liked another interesting one – http://www.DoCircuits.com . This has modeled real looking devices and components.