Yea I found that out. And making it a read only does not accomplish this either. Maybe something just to protect the macros from snooping eyes? Better than nothing.
So Im moving on to part 2 of my project which is parallel circuits. So far so good except for one detail. With the series circuit the total resistance is it the addition of the resistances ie Me.RT.Text = Val(Me.R2) + Val(Me.R1)
However in a parallel circuit it is the inverse addition of the resistances, so my formula to the students would be 1/((1/resistor 1) + (1/resistor 2)). When I try to enter Me.RT.Text = 1/((1/Val(Me.R2)) + (1/Val(Me.R1)) I get an compile error. Any thoughts?
FYI, two 10 ohm resistors in parallel for example with give you a total resisatance of 5 ohms. If you have a reistor of 20 ohms and say one of 10 ohms in parrallel with each other you would have a total resistance of 6.6667 ohms...