Some years ago I wrote a little simulation program for a virtual Millikan Oil Drop lab. Since I have this Blog, I thought I would take the opportunity to share it, in hopes that others will find it useful as well.
It is a standalone Windows .exe file, with supporting documents in PDF. It allows students to practice using the apparatus using either droplets (random mass) or beads (fixed mass), and either the real value of e (1.6×10^-19 C) or an unknown value that is close to, but not quite, the real value.
There are a few nifty built-in features, like speeding up time and a stopwatch that follows the simulation time, plus the ability to adjust the plate spacing and reverse the polarity.
It’s not perfect, and the built-in help file doesn’t seem to display properly in Win7 (the Help.PDF file is the same as the online help), but it does the job adequately. The zip package includes a list of the unknown e values. I would suggest that if you distribute this package to your students that you remove the unknown e values.txt file, though that is up to you as a teacher.
The package can be downloaded here. It is distributed as-is, with no warranty.
If it is useful to you, enjoy!