hi Bjoern, Bjoern Schliessmann wrote: > Hello all, > > I'm trying to simulate simple electric logic (asynchronous) > circuits. By "simple" I mean that I only want to know if I > have "current" or "no current" (it's quite digital) and the only > elements need to be (with some level of abstraction to my specific > problem) > > - sources (here begin currents) > - ground (here end currents) that doesn't bring you anywhere ;-) Current doesn't start or end at some location, current flows through a closed circuit.
And that's the first law you need: Kirchoff's current law: the total current in every node is ZERO !! The second formula you need: Kirchoff's voltage law, the sum of all voltages following any closed loop is ZERO. That's all you need, it gives you a set of linear equations, enough to let them solve by SciPy / NumPy. And let's forget about capacitors, inductors and semi-conductors for this moment ! Here is a simulation package, although designed for MatLab, it might give you a good idea of what your need. http://www.swarthmore.edu/NatSci/echeeve1/Ref/mna/MNA6.html There are few simulation related packages, but not directly suited for electronics http://www.mcs.vuw.ac.nz/cgi-bin/wiki/SimPy http://www.linuxjournal.com/article/7542 http://pyastra.sourceforge.net/ http://www.nelsim.com/scriptsim/python_man.html As an little test I wrote a PIC simulator (only core) in Python, it's very rough code (generated in a few evenings), if you're interested I could look it up. cheers, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
