I'm a little confused by this:
Prerequisite for the class:
Physics 1 and 2 (calculus-based)
College level calculus 1 and 2What I wish to have as prerequisite:
100-level programming
Your existing prerequisites don't really have much to do with electronics or programming? The prerequisite you're looking to add makes some sense except I'd see the Arduino as a good way of introducing non programmers to programming and you'll be excluding those people?