a good place to start with this would be implementing a linked list data structure. once you have that working, you're going to need to decide on what different attributes to have defined for each possible element (i.e., how long is the current stalled when passing through, what resistance level is there, what's the minimal voltage for it to work, etcetera). then, as long as you aren't looking for too much accuracy, and if each element is connected to only one other, it should be pretty easy. as soon as you start adding in branching and merging paths, however, things will get much more difficult. you will have to have multiple paths simulated in tandem. more complex elements, like capacitors, would also be problematic to implement. that's no reason to not give it a shot, though =)